{TAIL ~ The flange} 30 may be provided on the exterior of {HEAD ~ the curve}, and may have approximately four apertures 32 spaced along the length of the flange 
{ TAIL ~ The flange } 30 may be provided on the exterior of { HEAD ~ the curve } , and may have approximately four apertures 32 spaced along the length of the flange
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH