sighting-tube
基本解释
- 望筒
英汉例句
- Install sight tube in test cock 3.
在测试旋塞3号上安装观察管。 - When using EZ-TC, close No. 1 and 2 shutoffs and install sight tube using adaptor fitting.
在采用EZ-TC时，关闭1号和2号关闭阀，采用适配器连接件安装观察管。 - A surveying instrument consisting of a spirit level and a sighting tube,used to measure the angle of inclination of a line from the observer to the target.
由一个水平仪和一个观测管组成的测量工具，用来测量从观测者到目标的直线的倾斜角。 - When using EZ-TC, close No.1 and2 shutoffs and install sight tube using adaptor fitting.
在采用EZ-TC时，关闭1号和2号关闭阀，采用适配器连接件安装观察管。 - Holding in vertical position, fill sight tube with water (no water leakage can be permitted at sight tube joints).
将其垂直握住,将水注入观察管内(观察管连接处不能有泄漏)。