常見(jiàn)例句Some crack extension probably developed from the unfused section of the butt weld across the thickness of the stiffener during transport and erection.有些裂紋可能在運(yùn)輸和安裝過(guò)程中就從加勁肋對(duì)接銲未熔透処開(kāi)始發(fā)展。 返回 butt-welding