first and second flange members disposed along {HEAD ~ the full length} of {TAIL ~ opposing edges} of said plate member, wherein the first flange member is disposed away from the upper surface of said plate in a direction opposite to the direction of said second flange member 
of
first and second flange members disposed along { HEAD ~ the full length } of { TAIL ~ opposing edges } of said plate member , wherein the first flange member is disposed away from the upper surface of said plate in a direction opposite to the direction of said second flange member
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