Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.
注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。
Pump could not suction water. The fingers of pressure gauge and vacuum gauge swing acutely.
水泵不吸水，压力表及真空表的指针在剧烈摆动。
The fixed value of swing type of oil pump rotor is an important target for controlling and inspecting rotors quality.
摆线型机油泵转子的定值是控制和考核其质量的一个重要指标。
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