本文叙述以液面为基准面，用小型氦-氖激光器在空间建立激光垂直线的简易方法。
This article gives an easy way in which laser plumb line is set up by means of He-Ne laser in space with the liquid level as the base.
本文介绍了一种改进后的新型氦-氖激光器，其时间功率稳定性提高到3%，方位功率稳定性提高到6%。
In this paper, we introduce a new type of improved He-Ne laser. The time power stability has been increased to 3%, and the bearing power stability-6%.
按此方程所设计的用于长寿命氦—镉激光器的新型氦补充器，使氦—镉激光器寿命已超过一千小时。
With these equations we have designed for helium-cadmium lasers a new type of helium replenisher, which has lengthened the life time of a He-Cd laser to over 1000 hours so far.
按此方程所设计的用于长寿命氦—镉激光器的新型氦补充器，使氦—镉激光器寿命已超过一千小时。
With these equations we have designed for helium-cadmium lasers a new type of helium replenisher, which has lengthened the life time of a He-Cd laser to over 1000 hours so far.
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