Home / Standards / GB/T 16444 GB/T 16444 Active Planar double-enveloping worm gearing reducer 平面二次包络环面蜗杆减速器 Standard Type GBT ICS 77.180 CCS J17 Status 现行 Issue Date 2008-05-13 Implementation 2008-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会