{TAIL ~ A cam device} moves {HEAD ~ each piston} reciprocally and includes a rotating member having a first camming surface which is cylically rotated adjacent an end of each piston 
{ TAIL ~ A cam device } moves { HEAD ~ each piston } reciprocally and includes a rotating member having a first camming surface which is cylically rotated adjacent an end of each piston
TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH