单选题
1分
The plunger in a jerk pump is rotated until the release port is uncovered. If the port remains uncov...
The plunger in a jerk pump is rotated until the release port is uncovered. If the port remains uncovered all of the time, which of the listed operations will occur?
参考答案: A
参考解析: 注:脉动泵的柱塞一直转动直到回油孔被打开。如果回油孔总是开着,就不会供油。