{TAIL ~ The combination} 2 in which {HEAD ~ the central portion} of each tongue is substantially parallel to the web of the associated cross beam 
in
{ TAIL ~ The combination } 2 in which { HEAD ~ the central portion } of each tongue is substantially parallel to the web of the associated cross beam
TAIL TAIL TAIL TAIL TAIL TAIL OTH REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH