... inverse plumb line observation 倒锤线观测 level plumb line垂丝水平仪 plumb line observation 正锤线观测 ...
双语例句
1
This article gives an easy way in which laser plumbline is set up by means of He-Ne laser in space with the liquid level as the base.
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。
2
I spent all day at the construction site, from sunrise to sunset, using my 2 level to make sure the walls were even and my 3 plumbline to check that they were standing straight.