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 %LEOLRJUDSK\ ,(& )LEUH RSWLF LQWHUFRQQHFWLQJ GHYLFHV DQG SDVVLYH FRPSRQHQWV ± 3DUW  *HQHUDO DQGJXLGDQFH IRUSHUIRUPDQFHVWDQGDUGV  +DUPRQL]HGDV(1QRWPRGLILHG Licensed copy: University of Auckland Library, University of Auckland Library, Version correct as of 08/07/2012 23:38, (c) The British Standards Institution 2012 ,(&DOOSDUWV)LEUHRSWLFFRQQHFWRURSWLFDOLQWHUIDFHV ±3DUW2SWLFDOLQWHUIDFH +DUPRQL]HGLQ(1VHULHV QRW PRGLILHG ÚÚÚÚÚÚÚÚÚÚÚÊ ²²²²²²²²²  7REHSXEOLVKHG British Standards Institution (BSI) Licensed copy: University of Auckland Library, University of Auckland Library, Version correct as of 08/07/2012 23:38, (c) The British Standards Institution 2012 BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on standards in Europe and at the international level BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited Revisions Information on standards British Standards and PASs are periodically updated by amendment or revision Users of British Standards and PASs should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using British Standards would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Similary for PASs, please notify BSI Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 BSI provides a wide range of information on national, European and international standards through its Knowledge Centre BSI offers BSI Subscribing Members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of British Standards and PASs Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsigroup.com Tel: +44 (0)20 8996 7669 Fax: +44 (0)20 8996 7001 Email: plus@bsigroup.com Information regarding online access to British Standards and PASs via British Standards Online can be found at www.bsigroup.com/BSOL Further information about British Standards is available on the BSI website at www.bsigroup.com/standards Buying standards You may buy PDF and hard copy versions of standards directly using a credit card from the BSI Shop on the website www.bsigroup.com/shop In addition all orders for BSI, international and foreign standards publications can be addressed to BSI Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@bsigroup.com In response to orders for international standards, BSI will supply the British Standard implementation of the relevant international standard, unless otherwise requested BSI 389 Chiswick High Road London W4 4AL UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 www.bsigroup.com/standards raising standards worldwide™ Tel: +44 (0)20 8996 7004 Fax: +44 (0)20 8996 7005 Email: knowledgecentre@bsigroup.com BSI Subscribing Members are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) has formally licensed such information to BSI for commercial publication and use Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright & Licensing Department Tel: +44 (0)20 8996 7070 Email: copyright@bsigroup.com