Home / Standards / GB/T 12429-1990 GB/T 12429-1990 Quality Requirements and Inspection Methods for CO₂ Gas Shielded Welding of Bus Body 客车车身CO,气体保护焊焊接质 量 要 求及检验方法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A