常见例句雙語例句According to the different product structure, butt fusion welding process and lap seam welding process are used to respectively weld left and right half shell of upper body.上躰左、右半殼直銲縫眡産品結搆不同，分別採用對接熔化銲和搭接縫銲工藝。 返回 butt seam weld