标 准 编 号：DIN 7527-4-1972 简体中文标题：钢锻件.自由锻造的套筒的加工余量及允许偏差 繁体中文标题：钢锻件.自由锻造的套筒的加工余量及允许偏差 English Name：Steel Forgings; Machining Allowances and Permissible Variations for Seamless Open-die Forged Bushes...