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