Home / Standards / GB/T 6414-1999 GB/T 6414-1999 Abolished Castings--System of dimensional tolerances and machining allowances 铸件 尺寸公差与机械加工余量 Standard Type GBT ICS 77.140.80 CCS J31 Status 废止 Issue Date 1999-09-03 Implementation 2000-03-01 Responsible Dept 国家标准委 Drafting Unit N/A