... 焊接坡口形式 welding groove form ; welding groove types ; welding groove type 焊接坡口角度 angle of preparation 焊接坡口式阀门 weld-end valve ...
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... angle of position ==> 方位角 angle of preparation ==> 坡口面角度 angle of projection ==> 投射角 ...
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And to study the preparation of medicine powder during shaping technology and the mensuration of the Angle of repose.
并研究成型工艺中药粉的制备及休止角的测定。
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