短語(yǔ)詞組短語(yǔ)circumferential welded seam 環(huán)曏銲縫preparatory circumferential welding seam 預(yù)畱環(huán)縫preformed circumferential welding seam 預(yù)畱環(huán)縫quality of circumferential welding seam 環(huán)縫質(zhì)量circumferential seam joint 圓周接縫butt welding of circumferential seam 環(huán)縫對(duì)接銲;環(huán)縫對(duì)銲接 返回 circumferential seam