{HEAD ~ An upper bladeguard} is immovably secured to the housing and has {TAIL ~ a rear wall} defining an arcuate slot 
has
{ HEAD ~ An upper bladeguard } is immovably secured to the housing and has { TAIL ~ a rear wall } defining an arcuate slot
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH