... She’s packed in her job. 她已经放弃了她的工作。 pack off (迅速的,果断的)打发走 She packed the children off to bed. 她迅速地把孩子们都打发上床睡觉。 ...
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annulus pack off 环空封隔装置
pack-off 密封
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
pack-off bushing 封隔衬套
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