SMACNA 1520-1999(SMACNA 005-2003) 国外国际标准.pdf

SMACNA 1520-1999(SMACNA 005-2003) 国外国际标准.pdf

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ROUNDINDUSTRIAL DUCT CONSTRUCTION STANDARDS ANSIISMACNA 005-2003 SHEET METALAN CONDITIONING CONTRACTORS' N, INC. ROUND INDUSTRIAL DUCT CONSTRUCTION STANDARDS SECOND EDITION - SEPTEMBER, 1999 SHEET METAL AND AIR CONDITIONING CONTRACTORS’ NATIONAL ASSOCIATION, INC. 4201 Lafayette Center Drive Chantilly, VA 20151-1 209 ROUND INDUSTRIAL DUCT CONSTRUCTION STANDARDS ANSIEMACNA 005-2003 COPYRIGHTOI 977,1999 All Rights Reserved by SHEET METAL AND AIR CONDITIONING CONTRACTORS’ NATIONALASSOCIATION, INC. 4201 Lafayette Center Drive Chantilly, VA 20151-1209 Printed in the U.S.A. FIRST EDITION - 1977 SECOND EDITION - SEPTEMBER, 1999 Second Printing- May, 2004 Except as allowed in the Noticeto Users and in certain licensing contracts, no part of this book may be reproduced, stored in a retrievable system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. FOREWORD These duct construction standards are intended for use by contractors, fabricators, and designers of air pollution con- trol, pneumatic conveyance, and industrial ventilation systems.

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