Home / Standards / GB/T 4140-2003 GB/T 4140-2003 Active Flat-top chains and associated chain wheels for conveyors 输送用平顶链和链轮 Standard Type GBT ICS 21.220.30 CCS J18 Status 现行 Issue Date 2003-10-29 Implementation 2004-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会