短語(yǔ)詞組短語(yǔ)welding with backing 襯墊焊;墊板焊welding flux backing 焊劑墊;焊劑墊英語(yǔ);翻譯fusible welding backing 熔化性焊接背墊Xianghshan Welding Backing Factory 象山焊接襯墊廠welding with flux backing 焊劑墊焊Shanghai Taichang Welding Backing Factory 上海泰昌焊接襯墊廠backing welding 打底焊;底層焊接external backing welding 外焊根焊flux copper backing welding 銅板墊單面潛弧焊 返回 weld backing