短語詞組短語roof plummet 頂點(diǎn)對(duì)點(diǎn)器plummet to 驟降至lead plummet 鉛垂球;垂球Method plummet 錘測(cè)法Plummet Fittings 鉛錘配件包plummet popularity 垂直落下Penguin Plummet 企鵝跳水laser plummet 激光垂準(zhǔn)儀;激光對(duì)點(diǎn)器;雷射垂準(zhǔn)儀 返回 plummet