BRITISH STANDARD BS EN ISO

6259-1:2001
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Oct 26 10:07:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

Thermoplastics pipes — 公 司
有 限
Determination of 备
设
tensile properties
工业 —析
轶 创
Part 1: General test method
海 轩
上
公 司
有 限
设 备
工 业
创 析
轩 轶
上 海
公 司
有 限
设
The European Standard EN ISO 6259-1:2001 has the status of a 备
British Standard

工 业
创 析
轩 轶
上 海 ICS 23.040.20

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 BS EN ISO 6259-1:2001
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National foreword
This British Standard is the official English language version of
EN ISO 6259-1:2001. It is identical with ISO 6259-1:1997. It supersedes
BS EN 638:1995 which is withdrawn.

公 司
The UK participation in its preparation was entrusted by Technical Committee

which has the responsibility to:

有 限
PRI/88, Plastics piping systems, to Subcommittee PRI/88/4, Test methods,

—
设
aid enquirers to understand the text; 备
—
工 业
present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep the

创
—
析
UK interests informed;
monitor related international and European developments and

轩 轶 promulgate them in the UK.

上 海 A list of organizations represented on this subcommittee can be obtained on

request to its secretary.
Cross-references
The British Standards which implement international or European

公 司
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or

限
by using the “Search” facility of the BSI Electronic Catalogue or of
British Standards Online.

备 有
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.

from legal obligations.

业 设
Compliance with a British Standard does not of itself confer immunity

析 工
轶 创
海 轩
上
This British Standard, having
been prepared under the
Summary of pages

公 司
This document comprises a front cover, an inside front cover, the EN ISO title

限
direction of the Materials and
Chemicals Sector Policy and
page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank
page, pages 1 to 7 and a back cover.
Strategy Committee, was
published under the authority
of the Standards Policy and
document was last issued.
备 有
The BSI copyright date displayed in this document indicates when the

设
Strategy Committee on
19 September 2002

工 业
析
Amendments issued since publication

创
轩
© BSI 19 September 2002
轶 Amd. No. Date Comments

上 海
ISBN 0 580 40429 3
 EUROPEAN STANDARD EN ISO 6259-1
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NORME EUROPÉENNE
EUROPÄISCHE NORM
司
October 2001

ICS 23.040.20
限 公
Supersedes EN 638:1994

备 有
设
业 of tensile properties - Part
English version

析 工
Thermoplastics pipes - Determination
1: General test method (ISO 6259-1:1997)

轶 创
Tubes en matières thermoplastiques - Détermination des Rohre aus Thermoplasten - Bestimmung der

海 轩
caractéristiques en traction - Partie 1: Méthode générale
d'essai (ISO 6259-1:1997)
Eigenschaften im Zugversuch - Teil 1: Allegemeines
Prüfverfahren (ISO 6259-1:1997)

上 This European Standard was approved by CEN on 4 October 2001.

公 司
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.

有 限
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.

设 备
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,

业
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

工
创 析
轩 轶
上 海
公 司
有 限
设 备
工 业
创 析 EUROPEAN COMMITTEE FOR STANDARDIZATION

轶
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

海 轩
上
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6259-1:2001 E
worldwide for CEN national Members.
 EN ISO 6259−1:2001
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I NESO 26-95:12( 100E)

Foreword
公 司
有 限
设 备
The text of the International Standard from Technical Committee ISO/TC 138 "Plastics pipes,

业
fittings and valves for the transport of fluids" of the International Organization for
Standardization (ISO) has been taken over as an European Standard by Technical

which is held by NEN.

析 工
Committee CEN/TC 155 "Plastics piping systems and ducting systems", the secretariat of

轶 创
This European Standard supersedes EN 638:1994.

海 轩This European Standard shall be given the status of a national standard, either by publication
of an identical text or by endorsement, at the latest by April 2002, and conflicting national

上 standards shall be withdrawn at the latest by April 2002.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of

Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
公 司
the following countries are bound to implement this European Standard: Austria, Belgium,

限
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.

备 有
设
Endorsement notice

业
工
The text of the International Standard ISO 6259-1:1997 has been approved by CEN as a

析
European Standard without any modification.

轶 创
海 轩
上
公 司
有 限
设 备
工 业
创 析
轩 轶
上 海

2
 EN ISO 6259−1:2001
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INTERNATIONAL ISO
STANDARD 6259-1

公 司
有 限 First edition
1997-12-15

设 备
工 业
创 析
轩 轶
上 海 Thermoplastics pipes — Determination
of tensile properties —
Part 1:
General test method 公 司
有 限
设
en traction — 备
Tubes en matières thermoplastiques — Détermination des caractéristiques

业
Partie 1: Méthode générale d'essai

工
创 析
轩 轶
上 海
公 司
有 限
设 备
工 业
创 析
轩 轶
上 海

A Reference number
ISO 6259-1:1997(E)
 EN ISO 6259−1:2001
)E(7991:1-9526 OSI
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公 司
有 限
设 备
业
Foreword

析 工
ISO (the International Organization for Standardization) is a worldwide

创
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO

轩 轶
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be represented

上 海
on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are

circulated to the member bodies for voting. Publication as an International
公 司
Standard requires approval by at least 75 % of the member bodies casting
a vote.
有 限
设
International Standard ISO 6259-1 was prepared by Technical Committee 备
业
ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 5, General properties of pipes, fittings and valves

specifications.
析 工
of plastic materials and their accessories — Test methods and basic

轶 创
ISO 6259 consists of the following parts, under the general title

轩
Thermoplastics pipes — Determination of tensile properties :

上
—

—
海 Part 1: General test method

Part 2: Pipes made of unplasticized poly(vinyl chloride) (PVC-U),

chlorinated poly(vinyl chloride) (PVC-C) and high-impact poly(vinyl
chloride) (PVC-HI)

公 司
限
— Part 3: Polyolefin pipes

Annex A of this part of ISO 6259 is for information only.

备 有
业 设
析 工
© OSI 7991
轶 创
海 轩
All irthgs serevr.de lnUess toiwrehse scepifi,de trap on fo this lbupictaino may eb cudorperde
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上
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noitazidradnatS rof noitazinagrO lanoitanretnI
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tenretnI hc.osi@lartnec
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dnalreztiwS ni detnirP

ii ii
 © OSI
EN)E(7991:1-9526
ISO 6259−1:2001
OSI
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公 司
有 限
设 备
业
Introduction

析 工
This part of ISO 6259 specifies a short-term tensile test method for

创
determining the tensile properties of thermoplastics pipes.

轩 轶 It can provide data for further testing for the purpose of research and
development.

上 海 It cannot be regarded as significant for applications in which the conditions

of application of the force differ considerably with those in this test method,
such applications requiring the appropriate impact, creep and fatigue tests.

公 司
The tests of tensile properties should be principally regarded as tests of
material in the form of pipe. The results can be useful as a material process

performance.
有 限
control test, but are not a quantitative assessment of long term pipe

设 备
ISO 6259 has been drawn up on the basis of ISO 527.

工 业
For ease of use, it has been thought preferable to draw up a complete
document that can be used for determining the tensile properties of

创 析 thermoplastics pipes. For greater detail, reference should be made to

ISO 527.

轩 轶 It should however be noted that ISO 527 is applicable to materials in sheet

form, whereas ISO 6259 is applicable to materials in pipe form.

上 海 As it was considered essential to test the pipes as supplied, i.e. without

reduction in thickness, difficulties are those in the choice of test piece.

公 司
ISO 527 specifies test pieces a few millimetres thick, whereas the
thickness of a pipe can be up to around 60 mm. This is why certain

限
changes have been made on this point.

备 有
For thin-walled pipes, the test piece can be obtained by die cutting, while
for thick pipes, it can be obtained only by machining.

业 设
At present, ISO 6259 comprises three parts. The first part gives the general

工
conditions under which the tensile properties of thermoplastics pipes are to
be determined. The other two parts provide, respectively, particular

创 析 information on the execution of tests on pipe made from different materials

(see the foreword).

轩 轶 The basic specifications for the various materials are given in informative

海
annexes in the relevant parts.

iiiiii
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上
上
上

海
海
海

轩
轩
轩

轶
轶
轶

创
创
创

析
析
析

工
工
工

业
业
业

设
设
设

备
备
备

有
有
有

限
限
限

公
公
公

司
司
司
 EN ISO 6259−1:2001
LANOITANRETNI DRADNATS © OSI )E(7991:1-9526 OSI
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公 司
有 限
Thermoplastics pipes — Determination of tensile properties — 设 备
Part 1: 工 业
General test method
创 析
轩 轶
上 海
1 Scope
This part of ISO 6259 specifies a method of determining the tensile properties of thermoplastics pipes, including in
particular the following properties:

公 司
— stress at yield point;

有 限
备
— elongation at break.

设
This part of ISO 6259 is applicable to all types of thermoplastics pipe, regardless of their intended use.

业
2 Normative references
析 工
轶 创
The following standards contain provisions which, through reference in this text, constitute provisions of this part of

轩
ISO 6259. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 6259 are encouraged to investigate the possibility of applying the

上 海
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.

ISO 1167:1996, Thermoplastics pipes for the conveyance of fluids — Resistance to internal pressure — Test
method.

公 司
限
ISO 2602:1980, Statistical interpretation of test results — Estimation of the mean — Confidence interval.

traverse) — Description.
备 有
ISO 5893:1993, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of

业 设
ISO 6259-2:1997, Thermoplastics pipes — Determination of tensile properties — Part 2: Pipes made of

工
unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(vinyl chloride) (PVC-C) and high-impact poly(vinyl
chloride) (PVC-HI).

创 析
ISO 6259-3:1997, Thermoplastics pipes — Determination of tensile properties — Part 3: Polyolefin pipes.

轩 轶
上 海
3 Principle
Test pieces of given shape and dimensions are obtained from a thermoplastics pipe, in the longitudinal direction, by
cutting or machining.

The tensile properties are measured using a test machine under specified conditions.

11
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4 Apparatus
4.1 Tensile-testing machine, complying with ISO 5893 and meeting the specifications given in 4.2 to 4.4, as
follows.

公 司
有 限
4.2 Grips, for holding the test piece and attached to the machine so that the major axis of the test piece coincides
with the direction of pull through the centreline of the assembly. This can be achieved, for example, by using

备
centering pins in the grips.

业 设
The test piece shall be held such that slip relative to the grips is prevented as far as possible and this shall be
effected with the type of grip that maintains or increases pressure on the test piece as the force applied to the test
piece increases.

析 工
创
The clamping system shall not cause premature fracture at the grips.

轩 轶
4.3 Load indicator, incorporating a mechanism capable of showing the total tensile load carried by the test piece

海
when held by the grips. The mechanism shall be essentially free from inertia lag at the specified rate of testing, and
shall indicate the load with an accuracy of within 1 % of the actual value. Attention is drawn to ISO 5893.

上4.4 Extensometer, suitable for determining the gauge length of the test piece at any moment during the test.

公 司
The instrument shall be essentially free from inertia lag at the specified test speeds and shall be capable of

限
measuring deformation to an accuracy of within 1 %. Where a mechanical extensometer is used, this shall be fixed
to the test piece in such a way that the test piece undergoes the minimum damage and distortion and no slip occurs
between it and the extensometer.

备 有
be avoided whenever possible.
业 设
The measurement of elongation of the test piece on the basis of the movement of the grips lacks accuracy and shall

析
function of the stress in the test piece. 工
NOTE — It is desirable, but not essential, for this instrument to record this length, or any variation in it, automatically as a

轶 创
4.5 Micrometer or equivalent, capable of reading to 0,01 mm or less and suitable for measuring the thickness

轩
and width of the test piece.

海
上4.6 Cutting die, conforming to the relevant profile in ISO 6259-2 or ISO 6259-3, as applicable.

司
4.7 Milling machine and cutter, capable of producing the test piece specified in ISO 6259-2 or ISO 6259-3, as

公
applicable.

有 限
5 Test pieces
设 备
5.1 Nature of the test pieces

工 业
析
The test pieces shall conform to the relevant type specified in ISO 6259-2 or ISO 6259-3, as applicable.

创
轶
5.2 Preparation of test pieces
轩
上 海
5.2.1 Sampling from the pipe

Cut strips from the pipe as supplied, i.e. which has not been heated or flattened, so that their axis is parallel to the
axis of the pipe and the positions from which the strips are taken conform to item a) or item b) below, as applicable:

22
 © OSI EN)E(7991:1-9526
ISO 6259−1:2001
OSI
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a) Pipes of nominal outside diameter less than or equal to 63 mm

Use lengths of pipe of approximately 150 mm.

公 司
Cut strips from these various lengths, distributing them around the circumference starting from a generating line
taken as the reference line.

有 限
Unless otherwise specified, cut at least three strips from each sample so as to be able to take three test pieces (see
table 1).

设 备
业
Table 1 — Recommended number of test pieces

Nominal outside diameter, dn mm

析 工15 < dn < 75 75 < dn < 280 280 < dn < 450 dn > 450

创
Number of sectors or strips

轶
3 5 5 8

海 轩
b) Pipes of nominal outside diameter greater than 63 mm

上
Use a length of pipe of approximately 150 mm.

司
Cut strips from the length in such a way that they are equally distributed around the circumference of the pipe as
shown in figure 1.

限 公
Unless otherwise specified, divide the circumference of the pipe length into a number of sectors, depending on the
diameter of the pipe, as given in the table 1. Cut out one test piece per strip.

备 有
业 设
析 工
轶 创
海 轩
上
公 司
有 限
设 备
工 业
Key

创 析
轶
1 Sectors

轩
2 Strip

海
3 Test piece

上
Figure 1 — Preparation of test pieces

33
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5.2.2 Selection of test pieces

5.2.2.1 Selection

公 司
Select the test pieces from the centre of the strips taken from the length of pipe either by die cutting or machining, in
accordance with information relating to the applicable material given in the appropriate product standard.

5.2.2.2 Cutting method

有 限
设 备
Use the cutting die (4.6) with clean cutting edges, free from notches, with the profile shown in ISO 6259-2 or

业
ISO 6259-3, as applicable.

Cut the test piece from the strip (see 5.2.1).

析 工
5.2.2.3 Machining method

轶 创
轩
Produce the specimen by milling, where necessary using a milling jig.

海
上
The shape of the milling cutter and the machining conditions (speed of rotation and advance) are at the discretion of
the operator. They shall however be chosen so as to avoid any heating of the test piece and deterioration of its
surface such as cracks, scratches or other visible flaws.

NOTE — For the machining procedure, it is recommended that the user consult ISO 2818.

公 司
5.2.2.4 Gauge marks

有 限
measured to an accuracy of 1 % or better.
设 备
These shall be approximately equidistant from the mid-point, and the distance between the marks shall be

工 业
Gauge marks shall not be scratched, punched or impressed upon the test piece in any way that may damage the
material being tested. It shall be ensured that the marking medium has no detrimental effect on the material being

析
tested and that, in the case of parallel lines, they are as narrow as possible.

创
轶
5.2.2.5 Number of test pieces

轩
海
Carry out the test on the number of test pieces as shown in table 1 according to the thickness unless specified

上
otherwise by the referring standard.

6 Conditioning
公 司
有
specified in table 1 of ISO 1167:1996 according to the thickness of the test piece. 限
6.1 Prior to testing, condition the test pieces at a temperature of (23 ± 2) ∞C for a period of not less than the time

设 备
The test pieces shall not be tested within a period of 15 h after the production of the pipes, except for manufacturing
checks, unless otherwise specified in the referring standard.

工 业
6.2 Conditioning and testing may also be carried out at (27 ± 2) ∞C (in conformity with ISO 291), but in this case
析
the values obtained shall be corrected to 23 ∞C (reference temperature).

创
轩 轶
海
7 Test speed

上The test speed depends on the constituent material and wall thickness of the pipe and shall be as specified in the
applicable product standard or in ISO 6259-2 or ISO 6259-3.

44
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8 Procedure
8.1 Carry out the following procedure at a temperature of (23 ± 2) ∞C.

公 司
8.2 Measure, to within 0,01 mm, the width and minimum thickness of the central part of the test piece between the
gauge marks. Calculate the minimum cross-sectional area.

有 限
设 备
8.3 Place the test piece in the tensile-testing machine (4.1) in such a way that the axis of the test piece coincides
more or less with the direction of the tensile force. Clamp the grips (4.2) uniformly and tightly to avoid any slippage
of the test piece.

工 业
marks) of the test piece.
创 析
8.4 Where necessary, place and adjust the extensometer (4.4) on the gauge length (the part between the gauge

轩 轶
8.5 Adjust the test speed to the value specified and set the machine in motion.

上 海
8.6 Record the stress/strain curve up to the rupture of the test piece and record on this curve the force at the yield
point and the gauge length at rupture, or note directly the value of the force at yield and the gauge length after
rupture.

公 司
Discard any test pieces which slip in the grips, those which break at one of the shoulders and those which deform,

限
thus changing the width of the shoulders, and retest an identical number of test pieces.

备 有
9 Expression of results
业 设
9.1 Stress at yield

析 工
创
Calculate, for each test piece, the tensile stress at yield on the basis of the initial cross-sectional area of the test
piece, using the following equation:

s =
F
轩 轶
上 海
where
A

s is the tensile stress at yield, expressed in megapascals 1);

F is the force at yield, expressed in newtons;
公 司
A is the initial cross-sectional area of the test piece, expressed in square millimetres.

有 限
备
Express the result to three significant figures.

业 设
NOTE — The yield stress should, in fact, be calculated using the cross-sectional area of the test piece at yield, but for
reasons of convenience the initial cross-sectional area is used.

9.2 Elongation at break

析 工
轶 创
Calculate, for each test piece, the elongation at break, using the following formula:

海 e =
l − l0
l0
轩
× 100

上
____________
1) 1 MPa = 1 N/mm2

55
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)E(7991:1-9526 OSI © OSI
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where
e is the elongation at break, expressed as a percentage;
l
l0
is the gauge length at break, expressed in millimetres;
is the initial gauge length of the test piece, expressed in millimetres.
公 司
Express the result to three significant figures.
有 限
设 备
业
9.3 Statistical parameters

given in ISO 2602, if required.

析 工
The standard deviations and the 95 % confidence intervals of the mean values can be calculated by the procedure

9.4 Retests
轶 创
海 轩
If abnormal results are obtained on one or more test pieces, repeat the tests on twice that number of test pieces.

上For example, if, out of five test pieces tested, two give abnormal results, the test shall be repeated on a further four
test pieces.

公 司
限
10 Test report
The test report shall include the following information:

备 有
a) a reference to the relevant part of ISO 6259;

业 设
工
b) all details necessary for complete identification of the pipe tested, including the constituent material, type,
origin, nominal dimensions, etc.;

c)
创 析
the type of test piece used and the method by which it was prepared;

d)
轩 轶
the climatic conditions in the laboratory and the method of conditioning of the test pieces;

上 海
e)

f)
the number of test pieces tested;

the test speed;

g) the stress at yield (individual values, arithmetic mean and standard deviation);

公 司
限
h) the elongation at break (individual values, arithmetic mean and standard deviation);

i)
有
details of any operation not specified in this part of ISO 6259, as well as any incident likely to have had an

备
effect on the results, and in particular any special features (such as foreign bodies) observed on the test pieces
or in the cross-section of rupture;

业 设
工
j) the date of the test.

创 析
轩 轶
上 海

66
 © OSI EN)E(7991:1-9526
ISO 6259−1:2001
OSI
Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Thu Oct 26 10:07:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

Annex A
(informative)

Bibliography
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[1]
有
ISO 291:1997, Plastics — Standard atmospheres for conditioning and testing. 限
[2]
设 备
ISO 527-1:1993, Plastics — Determination of tensile properties — Part 1: General principles.

[3]
extrusion plastics.
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ISO 527-2:1993, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and

[4]
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ISO 2818:1994, Plastics — Preparation of test specimens by machining.

[5]

轩 轶
ISO 3127:1994, Thermoplastics pipes — Determination of resistance to external blows — Round-the-clock
method.

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有 限
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轩 轶
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77
 BS EN ISO
6259-1:2001
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