1、ICS 01.100.01; 35.240.10Technische Zeichnungen Allgemeine Grundlagen der Darstellung Teil 21: Ausfhrung von Linien mit CAD-Systemen(ISO 128-21 : 1997)European Standard EN ISO 128-21 : 2001 has the status of a DIN Standard.A comma is used as the decimal marker.National forewordThis standard has been
2、published in accordance with a decision taken by CEN/CMC to adopt, withoutalteration, International Standard ISO 128-21 as a European Standard.The responsible German body involved in its preparation was the Normenausschuss Technische Grundlagen(Fundamentals in Technology Standards Committee).The DIN
3、 Standards corresponding to the International Standards referred to in clause 2, Annex A, andAnnex ZA of the EN are as follows:ISO 128-20 DIN EN ISO 128-20ISO 5455 DIN ISO 5455ISO 6428 DIN ISO 6428AmendmentsISO 128-21 having been adopted as a European Standard, the status of the corresponding DIN St
4、andard(DIN ISO 128-21) has been changed accordingly.Previous editionDIN ISO 128-21: 1997-12.National Annex NAStandards referred to(and not included in Annex A)DIN EN ISO 128-20 Technical drawings General principles of presentation Part 20: Basic conventionsfor lines (ISO 128-20 : 1996)DIN ISO 6428 T
5、echnical drawings Requirements for microcopying (ISO 6428 : 1982)Ref. No. DIN EN ISO 128-21 : 2002-12English price group 11 Sales No. 111104.03DEUTSCHE NORM December 2002EN ISO 128-21Continued overleaf.EN comprises 14 pages. No part of this standard may be reproduced without the prior permission ofD
6、IN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).Technical drawings General principles of presentationPart 21: Preparation of lines by CAD systems(ISO 128-21 : 1997)English version of DIN EN ISO
7、 128-21Supersedes DIN ISO 128-21,December 1997 edition.English versionICS 01.100.01; 35.240.10Management Centre: rue de Stassart 36, B-1050 BrusselsEuropean Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr NormungTechnical drawings General principles of presentationP
8、art 21: Preparation of lines by CAD systems(ISO 128-21 : 1997) 2001. CEN All rights of exploitation in any form and by any meansreserved worldwide for CEN national members.Ref. No. EN ISO 128-21 : 2001 EDessins techniques Principesgnraux de reprsentation Partie 21: Prparation des traits parsystmes d
9、e CAO(ISO 128-21 : 1997)Technische Zeichnungen Allge-meine Grundlagen der Darstellung Teil 21: Ausfhrung von Linien mitCAD-Systemen (ISO 128-21 : 1997)This European Standard was approved by CEN on 2001-09-30.CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich stipulate the
10、 conditions for giving this European Standard the status of anational standard without any alteration.Up-to-date lists and bibliographical references concerning such national stand-ards may be obtained on application to the Management Centre or to any CENmember.The European Standards exist in three
11、official versions (English, French, German).A version in any other language made by translation under the responsibility of aCEN member into its own language and notified to the Management Centre hasthe same status as the official versions.CEN members are the national standards bodies of Austria, Be
12、lgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland,and the United Kingdom. EN ISO 128-21October 2001Page 2EN ISO 128-21 : 2001ForewordInternational StandardISO 128-21 : 1997 Technical
13、drawings General principles of presentation Part 21: Preparation of lines byCAD systems,which was prepared by ISO/TC 10 Technical drawings, product definition and related documentation of theInternational Organization for Standardization, has been adopted by CEN/CMC as a European Standard.This Europ
14、ean Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, and conflicting national standards withdrawn, by April 2002 at the latest.In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of the f
15、ollow-ing countries are bound to implement this European Standard:Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom.Endorsement noticeThe text of t
16、he International Standard ISO 128-21 : 1997 was approved by CEN as a European Standard withoutany modification.NOTE: Normative references to international publications are listed in Annex ZA (normative).Page 3EN ISO 128-21 : 2001Page 4EN ISO 128-21 : 2001Page 5EN ISO 128-21 : 2001Page 6EN ISO 128-21 : 2001Page 7EN ISO 128-21 : 2001Page 8EN ISO 128-21 : 2001Page 9EN ISO 128-21 : 2001Page 10EN ISO 128-21 : 2001Page 11EN ISO 128-21 : 2001Page 12EN ISO 128-21 : 2001Page 13EN ISO 128-21 : 2001Page 14EN ISO 128-21 : 2001
