The magnetization of the cylinder electromagnet generates magnetically attracting {HEAD ~ force} between {TAIL ~ the cylinder} and the piston to cause the piston to move in a one direction and thereafter magnetically repellent force to transfer the piston in the opposite direction 
between
The magnetization of the cylinder electromagnet generates magnetically attracting { HEAD ~ force } between { TAIL ~ the cylinder } and the piston to cause the piston to move in a one direction and thereafter magnetically repellent force to transfer the piston in the opposite direction
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH