The frame 20 is provided with a pair of transverse flanges 51 which are adapted to overlie {HEAD ~ a pair} of {TAIL ~ flanges} 52 which project from the plate 48 
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The frame 20 is provided with a pair of transverse flanges 51 which are adapted to overlie { HEAD ~ a pair } of { TAIL ~ flanges } 52 which project from the plate 48
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 OTH OTH OTH OTH OTH OTH OTH