Among them the automatic generation of dimension chain is the foundation of CAT and the described design function offers basis of tolerance analysis and tolerance synthesis.
其中尺寸链自动生成是进行计算机辅助公差设计的基础，它所描述的设计函数是进行公差分析和公差综合的依据。
The paper describes approaches about how to cat down the non-effective activities and key factors about how to build a supply chain logistics stracture.
着重分析了供应链物流体系如何能够降低无效的物流活动，从而实现物流活动有效的效率化以及建构供应链物流体系的要素。
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