It can make full use of energy with high absorption ratio and no pollution in vacuum environment.

它具有能量利用率高、无反射以及真空环境无污染等优点，可实现近形成型与快速制造。

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In vacuum environment, the performances of the arcjet were tested under several conditions with argon as the propellent.

在真空环境下，用氩为推进剂，得到了不同工况下发动机的性能参数。

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The substrate carrier is particularly suitable for substrate transferring in vacuum environment, and the transferring process is safe and has accurate location.

本发明基片运载装置尤其适用于真空环境的基片传送，传送过程安全、定位精确。

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Such widespread police reform did not occur in a vacuum, but in an environment of real people with genuine concerns and expectations, he said.

BBC: NEWS | UK | Northern Ireland | Policing changes 'will be achieved'