基本解释[机械工程]焊管拉模英汉例句双语例句This invention changes its 200 years history of limitation to roof gutter and drainpipe, due to its easy bending, cutting and welding property.改变200年以来利用锌金属易于弯折、剪焊等加工特性而限于作为制造屋面天沟及排水管之用。welding gutter更多例句专业释义机械工程焊管拉模