The Research of Engineering Change Management in Collaborative Working Environment;
有利于解决问题的工作环境；
Engineering change management. To register EC No. , track status and record the document.
负责工程变更编号的发放与管理，工程变更的状态跟踪及文件存档；
Cost effectively enhance paperless reporting for manufacturing, nonconformances and Engineering Change management.
低成本地增强制造过程、不合格品和工程变更管理的无纸化报告；\ n ？
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