Flange 37 must be fixed sufficiently forwardly on forward section 28 to prevent interference with {HEAD ~ slidable movement} of {TAIL ~ rearward section} 26 during longitudinal repositioning thereof 
of
Flange 37 must be fixed sufficiently forwardly on forward section 28 to prevent interference with { HEAD ~ slidable movement } of { TAIL ~ rearward section } 26 during longitudinal repositioning thereof
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 TAIL OTH OTH OTH OTH OTH