{HEAD ~ The size} of the chambers 12 17 and the timing of {TAIL ~ the applied voltage} determine the capacity of the pump 
{ HEAD ~ The size } of the chambers 12 17 and the timing of { TAIL ~ the applied voltage } determine the capacity of the pump
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH