{HEAD ~ The abutment structure} is attached at {TAIL ~ the opposing sides} of the seaming board proximate one of the opposing ends, and is adjustable between a closed condition opposing the upper surface and an open condition away from the upper surface and the opposing sides of the seaming board 
is attached at
{ HEAD ~ The abutment structure } is attached at { TAIL ~ the opposing sides } of the seaming board proximate one of the opposing ends , and is adjustable between a closed condition opposing the upper surface and an open condition away from the upper surface and the opposing sides of the seaming board
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH