Alternatively, such struts may constitute shutters joining to the tube body by resilient hinges and pivotable about {HEAD ~ such hinges} between {TAIL ~ such radially inner and outer positions} 
between
Alternatively , such struts may constitute shutters joining to the tube body by resilient hinges and pivotable about { HEAD ~ such hinges } between { TAIL ~ such radially inner and outer positions }
OTH OTH OTH 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 TAIL TAIL TAIL TAIL