用“air locking”造句大全，air locking造句
The utility model can efficiently prevent air locking phenomena and the eccentric wear of the plunger, increase the production quantity of raw oil and extend the service life of the oil well pump.
The spiral vane is fixed on the central shaft, forming a whole body which is disposed at the middle of the spiral air locking valve body and is firmly welded with the spiral air locking valve body.
The valve is mainly made up of body, disc, axle, rocker and heavy hammer etc. It realizes discharging and air locking using trimming moment.
