selector valve means connected between the fluid supply line and the force transmitting mechanism for selectively directing {TAIL ~ pressurized fluid} from the fluid supply line to the force transmitting {HEAD ~ mechanism} 
selector valve means connected between the fluid supply line and the force transmitting mechanism for selectively directing { TAIL ~ pressurized fluid } from the fluid supply line to the force transmitting { HEAD ~ mechanism }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD