“progressive dies”可以造什么句,progressive dies造句
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Use constructional type of progressive dies, change present one step operation of single die construction for two-step blanking, i. e, first step semi-blanking, second ejecting material.
Use constructional type of progressive dies , change present one step operation of single die construction for two-step blanking , i.
And meanwhile, two kinds of twisting formation devices are introduced, which could serve as a reference for the design and manufacture of similar multi-position progressive dies.