A suitable one way valve device is disposed in a connection between the inlet and {HEAD ~ the cylinder}, and another oppositely directed one way valve device is disposed in a connection betweenn the outlet and {TAIL ~ each cylinder} 
A suitable one way valve device is disposed in a connection between the inlet and { HEAD ~ the cylinder } , and another oppositely directed one way valve device is disposed in a connection betweenn the outlet and { TAIL ~ each cylinder }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL