offline cipher machine

中文翻译线外式密码机

同义词释义

1)off-line cipher machine,线外式密码机

2)electro-machianical ciphering machine,机电式密码机

3)hand-held encryption unit,手持式密码机

4)Infrared digital camera,红外线数码相机

5)attached mechanical sealing,外装式机械密封

6)mechanical seal with outward leakage,外流式机械密封

An attached mechanical sealing is used during pump shut down.

该密封装置采用负压密封原理解决砂泵在运转过程中的密封问题,用外装式机械密封作为停车密封,使砂泵在运转和停机时都能可靠地密封钻井液,无故障运转时间超过3 500 h。