基本解釋用墊環(huán)的焊縫；[機(jī)] 底焊焊縫；打底焊道英漢例句雙語例句The laser beam melts a portion of the steel core and the segment backing metal, forming a weld.激光光束熔體部分鋼鐵核心和后盾金屬部分，形成焊縫。Welding methods and technology of narrow gap quirk backing weld were discussed. Indirect quirk backing weld using manual hydrogen arc welding is considered as the best result.討論了窄間隙深槽打底焊焊接方法和工藝，認(rèn)為用手工氬弧焊進(jìn)行單面深槽打底焊效果最好。They cause all the welding of double tubes, joint boxes and gas-collecting tubes to realize the backing weld of TAW-P. The quality of the double tube waste heat boilers have been improved.并對噴嘴、規(guī)范參數(shù)、坡口形式等作了相應(yīng)改進(jìn)，使雙套管、聯(lián)箱、集氣管的焊接全部實(shí)現(xiàn)了鎢極氬弧焊打底，從而提高了雙套管廢熱鍋爐的質(zhì)量。backing weld更多例句詞組短語短語backing g weld 用墊環(huán)的焊縫backing groove of weld 焊縫反面坡口weld backing 焊接襯墊;焊縫襯墊;焊縫墊;焊縫背襯墊nonfusible weld backing 非熔性焊接背墊weld with backing ring 背面墊環(huán)焊接backing weld更多詞組專業(yè)釋義機(jī)械工程底層焊接底焊焊縫打底焊墊板焊