The first piston is actuated by {HEAD ~ an external force} for pressurizing {TAIL ~ hydraulic fluid} in the first cylinder 
for pressurizing
The first piston is actuated by { HEAD ~ an external force } for pressurizing { TAIL ~ hydraulic fluid } in the first cylinder
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH