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.

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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%.

youdao

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%.

youdao