短語詞組短語welding with flux backing 銲劑墊銲welding g flux 銲劑welding -flux 銲劑welding with flux support 銲劑墊銲Copper gas welding flux 銅氣銲熔劑sintered welding flux 燒結銲劑lloy welding flux 郃金助銲劑alloy welding flux 郃金助銲劑gas -welding flux 氣銲銲劑 返回 welding flux