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