bottom cone meaning in English

下圆锥轮，下铁炮

The mechanical property , phase , the adhesion state of the interface , and the microstructure of all kinds of coatings ( bg coating , bg / ha composite coating , bg / ha graded coating ) were analyzed by the routine and modern testing means ( xrd , ir , sem , ed ax , xps and empa etc . ) . the shear strength of the coating had been tested by a new method - the flat bottom cone shear testing
采用常规和现代测试手段( xrd 、 ir 、 sem 、 edax 、 xps和empa等)对所制备的各种涂层( bg涂层、 bg ha复合涂层、 bg ha梯度涂层)的力学性能、物相、界面结合状态以及涂层表面和内部的微观结构等进行分析。