當前位置:
首頁 >
客車車身CO2氣體保護焊焊接質量要求及檢驗方法

The quality requirement and test method for the carbon-dioxide arc welding of coach-body
標準號:GB 12429-1990
The quality requirement and test method for the carbon-dioxide arc welding of coach-body
標準號:GB 12429-1990