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