{HEAD ~ The flange} 28 may be provided on the interior of {TAIL ~ the curve} of the channel section 14, and may have approximately three apertures 32 spaced along the length of the flange 
{ HEAD ~ The flange } 28 may be provided on the interior of { TAIL ~ the curve } of the channel section 14 , and may have approximately three apertures 32 spaced along the length of the flange
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