Has a long service life and high reliability, can be used in the demanding high and low temperature environment, poor power conditions.
具有超长的服务寿命和很高的可靠性，可以应用于苛刻的高低温环境、恶劣的电力条件。
It introduces a space environment simulator control system used to realize ultra low temperature and high vacuum.
介绍一种用于实现超低温、高真空的太空环境模拟器控制系统。
But there are some shortage of ordinary single-stage heat pump in low-temperature environment, such as high compression ratio, devoid heating power and low efficiency.
但普通单级空气源热泵热水器在低温环境下运行中存在压缩比过大、制热量不足和制热效率太低等问题。
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