A lock screw is interlocked in {HEAD ~ engagement} between the cover and {TAIL ~ the at least one end frame} to obviate displacement of the interconnecting means from their respective interconnections in releasable engagement with each other 
A lock screw is interlocked in { HEAD ~ engagement } between the cover and { TAIL ~ the at least one end frame } to obviate displacement of the interconnecting means from their respective interconnections in releasable engagement with each other
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH