{HEAD ~ The shutters} may include {TAIL ~ fender tabs} which retain them in radially outer position once they have been moved thereto 
include
{ HEAD ~ The shutters } may include { TAIL ~ fender tabs } which retain them in radially outer position once they have been moved thereto
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH