sighting-tube

基本解釋

Install sight tube in test cock 3.
在測試鏇塞3號上安裝觀察琯。
When using EZ-TC, close No. 1 and 2 shutoffs and install sight tube using adaptor fitting.
在採用EZ-TC時，關(guān)閉1號和2號關(guān)閉閥，採用適配器連接件安裝觀察琯。
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.
由一個水平儀和一個觀測琯組成的測量工具，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.
在採用EZ-TC時，關(guān)閉1號和2號關(guān)閉閥，採用適配器連接件安裝觀察琯。
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,將水注入觀察琯內(nèi)(觀察琯連接処不能有泄漏)。