Then the cylinder deep drawing test with three different materials is carried out.
而且还对三种材料进行了圆筒拉深实验。
All friction coefficients between deformed press and die during sheet metal deep drawing were tested using new kinds of friction test device designed by authors.
采用作者设计的一种新型测量薄板深冲成形过程中工具与工件之间摩擦系数的模拟装置，测定了相同材质的带材在不同条件下的摩擦系数。
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