a hydraulic device receiving {HEAD ~ discharged oil} from said pump to assist a steering wheel by {TAIL ~ hydraulic power} 
a hydraulic device receiving { HEAD ~ discharged oil } from said pump to assist a steering wheel by { TAIL ~ hydraulic power }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL