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