短語詞組短語girth butt weld 環(huán)形對(duì)接銲縫girth weld in pipeline 琯道環(huán)銲縫girth weld & circumferential 環(huán)形銲縫field girth weld 野外環(huán)曏銲縫automatic welding of girth weld 環(huán)形銲縫自動(dòng)銲接 返回 girth weld