Home / Standards / GB/T 21297-2007 GB/T 21297-2007 Active Laboratory glassware - Interchangeable conical ground joint 实验室玻璃仪器 互换锥形磨砂接头 Standard Type GBT ICS 71.040.20 CCS N64 Status 现行 Issue Date 2007-12-05 Implementation 2008-09-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A