1) servo supply relief valve
伺服机构供油安全阀
2) servo relief valve
伺服机构安全阀
3) servo relief valve setting
伺服机构安全阀调定
4) servo supply passage
伺服机构供油道
5) servo relief valve
伺服安全阀
6) servovalve
伺服机构阀
参考词条