How to use composite pressure gauge and imported three-color gauge tube

The red tube is connected to the right high pressure meter, the blue tube is connected to the left low pressure meter, and the yellow tube is connected to the middle. When used, the right hand wheel is closed, and the left hand wheel is opened. The blue and yellow tubes are connected. If the left hand wheel is closed, the right hand wheel is opened. Then the red and yellow pipes are connected, the two handwheels are open, and the three pipes are connected. The ice is the blue tube connected to the compressor process tube, the yellow tube is connected to the fluorine bottle, and the red tube is connected to the vacuum pump, which is very flexible and easy to use.

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