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