文件名称：PDF 1.7 format
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更新时间：2021-07-13 06:00:41
PDF 1.7
PDF Reference, sixth edition: Adobe Portable Document Format version 1.7. November 2006 NOTICE: All information contained herein is the property of Adobe Systems Incorporated. Except as permitted by any such license, no part of this guide may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of Adobe Systems Incorporated. Please note that the content in this guide is protected under copyright law even if it is not distributed with software that includes an end user license agreement.