Process Hazards Analysis, September 2008Copyright 2008 DuPont. All rights reserved. The DuPont Oval Logo, DuPont, and The miracles of science are registered trademarks or trademarks of DuPont or its affiliates.工艺安全分析Process Hazards Analysis (PHA)2Process Hazards Analysis, September 2008Copyright 2008 DuPont. All rights reserved. The DuPont Oval Logo, DuPont, and The miracles of science are registered trademarks or trademarks of DuPont or its affiliates.安全经验分享3Process Hazards Analysis, September