电子电器技术人员应知应会(en)Newnes is an imprint of Elsevier 30 Corporate Drive, Suite 400 Burlington, MA 01803, USA Linacre House, Jordan Hill Oxford OX2 8DP, UK Copyright 2009, Elsevier Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Permissions may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, e-mail: permissions@elsevier.com.uk. You may also complete your request online via the Elsevier homepage (www.elsevier.com), by selecting “Customer Support” and then “Obtaining Permissions.” Recognizing the importance ……