管圈 meaning in Chinese

tube coil

Metallic materials . tube ring hydraulic pressure test
金属材料.管圈液压试验
Projects for the qc circles are proposed in two ways
品管圈主题的选定有下列两种方法：
Certificate for the completion of an advanced quality control circle project
进阶品管圈证书
As for basic qcc certificate , plus
要有基础品管圈证书资格
How the qc circle movement spreads
如何普及品管圈的活动

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