Through the experiments, we have studied the working characteristics of the down-hole pump at different inclined angles and studied the moving pattern of ball valves.
以试验为手段，研究了深井泵在一定倾斜角度下的工作特性及球阀的运动规律。
Through the experiments, we have studied the working characteristics of the down-hole pump at different inclined angles and studied the moving pattern of ball valves.
以试验为手段，研究了深井泵在一定倾斜角度下的工作特性及球阀的运动规律。
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