{HEAD ~ The forked end} 51a of {TAIL ~ fork} 51 is normally located between a pair of plates 56, 57 mounted to the front section 11b of the fixed frame 11 
{ HEAD ~ The forked end } 51a of { TAIL ~ fork } 51 is normally located between a pair of plates 56 , 57 mounted to the front section 11b of the fixed frame 11
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL 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 OTH OTH OTH