It comprises a cylinder , which is closed at {TAIL ~ one end}, and piston , which slides inside {HEAD ~ the cylinder}  
It comprises a cylinder , which is closed at { TAIL ~ one end } , and piston , which slides inside { HEAD ~ the cylinder }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH