a variable throttle mechanism installed in {HEAD ~ said pump} to change a flow rate of said discharged oil from {TAIL ~ said pump} to said hydraulic device 
a variable throttle mechanism installed in { HEAD ~ said pump } to change a flow rate of said discharged oil from { TAIL ~ said pump } to said hydraulic device
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH