Home / Standards / GB/T 33931-2017 GB/T 33931-2017 Active Mine hoists—Head sheave and guide pulley—Requirements for repair process 矿井提升机 天轮和导向轮 修复工艺要求 Standard Type GBT ICS 73.100.40 CCS D93 Status 现行 Issue Date 2017-07-12 Implementation 2018-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A