Home / Standards / GB/T 12234-2007 GB/T 12234-2007 Abolished Bolted bonnet steel gate valves for petroleum and natural gas industries 石油、天然气工业用螺柱连接阀盖的钢制闸阀 Standard Type GBT ICS 23.060.30 CCS J16 Status 废止 Issue Date 2007-04-18 Implementation 2007-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会