锤上钢质自由锻件机械加工余量与公差 黑皮锻件
Machining allowances and tolerances for steel open die forgings on hammer--Forging without machining
标准状态
发布于:1995-12-14
实施于:1996-08-01
已废止
Machining allowances and tolerances for steel open die forgings on hammer--Forging without machining