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