问题
单项选择题
只要改变柱塞的（）就能改变泵的流量，可实现单向或双向变量。
A.工作行程
B.工作过程
C.工作规程
D.工作温度
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
只要改变柱塞的（）就能改变泵的流量，可实现单向或双向变量。
A.工作行程
B.工作过程
C.工作规程
D.工作温度
参考答案：A
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