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