Home / Standards / GB/T 986-1988 GB/T 986-1988 Abolished Basic forms and sizes of weld grooves for submerged arc welding 埋弧焊焊缝坡口的基本形式和尺寸 Standard Type GBT ICS 25.160.40 CCS J33 Status 废止 Issue Date 1988-06-25 Implementation 1989-03-01 Responsible Dept 国家标准委 Drafting Unit N/A