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