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When a hydraulic vane pump is working which of the following is in contact with the vanes..

2020-09-18 20:35:36 资格考试 阅读

问题详情

A.(1) only

B.(2) only

C.(1) and (2)

D.(1), (2) and (3)

请帮忙给出正确答案和分析，谢谢！

参考答案

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