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