{HEAD ~ A cycling valve} , reversing valve and {TAIL ~ actuator mechanism} provide operator control of the devices contained in housing  
{ HEAD ~ A cycling valve } , reversing valve and { TAIL ~ actuator mechanism } provide operator control of the devices contained in housing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH