Home / Standards / GB 985-1988 GB 985-1988 Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding 气焊、手工电弧焊及气体保护焊焊缝坡口的基本形式与尺寸 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A