单选题泵控型液压舵机辅油泵一般不能起的作用是（）。A为主油路补油B向变量主泵壳体内供油帮助起散热作用C为主泵伺服变量机构提供控制油D主泵有故障时，应急操舵
单选题
泵控型液压舵机辅油泵一般不能起的作用是（）。
A
为主油路补油
B
向变量主泵壳体内供油帮助起散热作用
C
为主泵伺服变量机构提供控制油
D
主泵有故障时，应急操舵
参考解析
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