annulus pack off 环空封隔装置
pack off 匆匆打发 ; 打发走 ; 密封装置
annular pack off 环形封隔
pack-off element 封隔元件
pack-off sealing area 封隔密封区
pack-off adapter 密封接头
lead seal pack off 铅封封隔
bottom casing pack off 底部套管封隔器
It would be more liberating to pack it all off to a laundry and not necessarily more expensive, since no capital investment is required.
全部打包送去洗衣店会更自由,也不一定更贵,因为不需要资本投资。
It means you can take the posters off the wall, pack up winter clothes, return all borrowed books to the library, etc.
这意味着你可以把墙上的海报拿下来,把冬天的衣服打包,把借的书还给图书馆等等。
The evidence shows that a large number of universities have fallen off the back of the pack, a few perform strongly and the rest chase the leaders.
有证据表明,很多大学已经落后了,有少数学校表现出色,而其余的都在不断追赶领先者。
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