锤上钢质自由锻件机械加工余量与公差 轴类
Machining allowances and tolerances for steel open die forgings on hammer - Shafts
2008-02-28
JB 4250.4-1986
锤上铜质胎模锻件机械加工余量与公差合模成形类
1986-07-04
GB/T 12362-2016
钢质模锻件 公差及机械加工余量
Steel die forgings—Tolerance and machining allowance
2016-12-13
GB/T 21469-2008
锤上钢质自由锻件机械加工余量与公差 一般要求
Machining allowances and tolerances for steel open die forgings on hammer - General requirement
2008-02-28
JB 4250.3-1986
锤上铜质胎模锻件机械加工余量与公差套模、垫模成形类
1987-02-01
GB/T 21470-2008
锤上钢质自由锻件机械加工余量与公差 盘、柱、环、筒类
Machining allowances and tolerances for steel open die forgings on hammer - Disks, columns, rings and seamless cylindrical sleeves