sighting-tube

基本解釋

Install sight tube in test cock 3.
在測試旋塞3號(hào)上安裝觀察管。
When using EZ-TC, close No. 1 and 2 shutoffs and install sight tube using adaptor fitting.
在采用EZ-TC時(shí)，關(guān)閉1號(hào)和2號(hào)關(guān)閉閥，采用適配器連接件安裝觀察管。
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.
由一個(gè)水平儀和一個(gè)觀測管組成的測量工具，用來測量從觀測者到目標(biāo)的直線的傾斜角。
When using EZ-TC, close No.1 and2 shutoffs and install sight tube using adaptor fitting.
在采用EZ-TC時(shí)，關(guān)閉1號(hào)和2號(hào)關(guān)閉閥，采用適配器連接件安裝觀察管。
Holding in vertical position, fill sight tube with water (no water leakage can be permitted at sight tube joints).
將其垂直握住,將水注入觀察管內(nèi)(觀察管連接處不能有泄漏)。