return-blank type blanking die

... scrapless progressive die 无废料连续模 return-blank type blanking die 顶出式落料模 expanding die 胀形模，扩管模 ...

blank-英汉词典-英中字典-速译通... ... return-blank type blanking die 带顶件机构的落料模 return-trace blanking 回程消隐 ...