明杆平行式双闸滑阀
rising-stem double-disk parallel slide valve
铲斗控制阀滑阀
bucket control valve spool
吊钩马达控制阀滑阀
hook motor control valve spool
辅助制动阀滑阀
secondary brake valve spool
减速器控制阀滑阀
retarder control valve spool
减压阀滑阀
pressure reducing valve spool
快速响应阀滑阀
quick-response valve spool
速度传感阀滑阀
speed sensing valve spool
速度控制阀滑阀
speed control valve spool
停放制动器阀滑阀
parking brake valve spool