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