蓋艙,封頭坑 cavity closure: 空泡閉合closure head: 封頭; 鋼管悶頭; 外殼頂蓋head cavity: 頭腔the head cavity: 頭腔closure head assembly: 反應(yīng)堆壓力殼頂蓋; 封頭組合體下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯