短語詞組短語welding with flux backing 焊劑墊焊welding g flux 焊劑welding -flux 焊劑welding with flux support 焊劑墊焊Copper gas welding flux 銅氣焊熔劑sintered welding flux 燒結(jié)焊劑lloy welding flux 合金助焊劑alloy welding flux 合金助焊劑gas -welding flux 氣焊焊劑 返回 welding flux