The piezoelectric system is effective to move {HEAD ~ the flow control member} 128, 129 between {TAIL ~ the open and closed positions} 
between
The piezoelectric system is effective to move { HEAD ~ the flow control member } 128 , 129 between { TAIL ~ the open and closed positions }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL