Home / Standards / GB/T 16443-1996 GB/T 16443-1996 Active Planar double-enveloping worm gearing geometrical data symbols 平面二次包络环面蜗杆传动几何要素代号 Standard Type GBT ICS 21.200 CCS J17 Status 现行 Issue Date 1996-06-17 Implementation 1996-12-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A