基本解釋[機(jī)械工程]焊縫背墊英漢例句雙語(yǔ)例句Flux-cored wire is applied to the austenitic stainless steel pipe by back weld, MAG for the filling and cosmetic weld, at horizontal fixed round welding vertically up.采用藥芯焊絲對(duì)奧氏體不銹鋼管道進(jìn)行打底焊接，MAG焊填充及蓋面焊，立向上的水平固定全位置焊接。weld back-up更多例句專(zhuān)業(yè)釋義機(jī)械工程焊縫背墊