全玻璃真空太阳集热管内外玻璃管夹层间真空度的保持情况对有效降低热损、提高太阳能的利用率、延长集热管的寿命都有至关重要的作用。
The vacuum degree between the inner and cover glass tubes plays a very important role in heat loss and the life time of all-glass evacuated collector tube.
由于沉积金刚石膜的时间长达几十个小时，而真空室真空度的稳定性对成膜质量的好坏有很大的影响，所以保持真空度的稳定将成为一个关键性的技术问题。
Because the time is for several ten hour to deposit the diamond film, the vacuum stability in chamber will affect the film quality greatly, so it is the key technology to keep the vacuum stability.
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