短語詞組短語roof plummet 頂點對點器plummet to 驟降至lead plummet 鉛垂球;垂球Method plummet 鎚測法Plummet Fittings 鉛鎚配件包plummet popularity 垂直落下Penguin Plummet 企鵞跳水laser plummet 激光垂準儀;激光對點器;雷射垂準儀 返回 plummet