Work process just to make a small amount of supplement. Hydraulic piston pump can be operated single-well, you can also build pump centralized management, a wide range of displacement adaptation, from tens to thousands of cubic diesel flow meter meters per day, etc., suitable for deep, high-lift wells, heavy oil, inclined. The advantage is the displacement can be adjusted, from the convenience of the pump tubing can not afford the operation and management. Pump efficiency up to 85%. The disadvantage is that the ground have to build a high-pressure pipelines, power fluid to be processed, an increase of well construction and management costs.
In addition to the loss of the signal actually decile, there partly because Zhang attenuation distribution device itself, so larger than the calculated value. As is often the loss of value of the two allocator works 3.5dB, 4 dispensers often lost value 8dB. , the frequency range: a dispenser used throughout the cable television network, mobile fuel dispenser and therefore should have a broadband frequency characteristic. Return loss , the RF characteristics usually pass splitter connected to the branch or trunk line midway by a main input terminal, an output terminal and a number of main branches constitute the output, the output of which branch only get main Road, a small portion of the input signal, the majority of the output signal is still along the main road and continue to transmit backwards.