In an alternate embodiment, the pitch may be six inches, with {HEAD ~ a depth} of {TAIL ~ one inch} 
of
In an alternate embodiment , the pitch may be six inches , with { HEAD ~ a depth } of { TAIL ~ one inch }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL