{HEAD ~ The pitch} of {TAIL ~ the pipe} 20, as measured perpendicularly between crests of successive corrugations 22, is five inches, and the depth is one half inch, as measured from the crest of a corrugation 22 to the flat portion 24 
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{ HEAD ~ The pitch } of { TAIL ~ the pipe } 20 , as measured perpendicularly between crests of successive corrugations 22 , is five inches , and the depth is one half inch , as measured from the crest of a corrugation 22 to the flat portion 24
HEAD HEAD HEAD HEAD HEAD HEAD REL 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