前言： 随着“西气”进沪，上海形成了“东、西”双气源供气的格局。
The entrance of West gas into Shanghai has made it a double-gas supplied city.
发生单气隙放电时气隙的击穿电压要比双气隙放电时气隙的击穿电压小。
The breakdown voltage of the single air-gap discharge was lower than that of the double airgap discharge.
为了消除被测气体以外的其它随机因素的影响，在设计过程中采用了双光源、双光路、双气室结构。
In order to eliminate the effect of other factors on measurement precision, the double light sources, double light paths and double cells are used in this system.
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