left slope selector valve
right slope control selector valve
slope control selector valve
four valve control valve group
pneumatic selector control valve
retarder control valve control
stick control valve control section
swing control valve control
LUE Left Upper Extremity
right-left upper-frame strengthen spares
UCL Upper Control Limit
upper control limit
控制阀范围性
管制图上限
安全控制上限
管制上限
上控制限
控制上限
upper conveyor speed control valve