润滑油选择器安全阀
lube selector relief valve
速度离合器选择器滑阀
speed clutch selector spool
变速箱旋转选择器滑阀
transmission rotary selector spool
铲运机传动系选择器滑阀
scraper transmission selector spool
三位选择器滑阀
three-position selector spool
双位选择器滑阀
two-position selector spool
拖拉机变速箱旋转选择器滑阀
tractor transmission rotary selector spool
位移选择器滑阀
displacement selector spool
旋转式选择器滑阀挡块
rotary selector spool stop
选择器滑阀压力通道
selector spool pressure passage