短语词组短語CNC lathe -bed 數控車牀牀身gap -type lathe bed 馬鞍車牀牀身gear -head lathe with gap bed 齒輪馬鞍車牀geared head gap -bed lathe 馬鞍車牀geared d head gap -bed lathe 馬鞍車牀 返回 lathe-bed