短语词组短語hot -rolling billet 熱軋坯料continuous -casting -rolling of sheet billet 薄板坯連鑄連軋welding multi billet rolling 銲接小方坯軋制shaped billet rolling machine 異性坯輥道billet rolling train 小胚輥軋系列whole billet rolling 整坯軋制 返回 rolling billet