In addition, the skirt valve typically lacks a spoke to hold {HEAD ~ the center} of {TAIL ~ the valve} in place, and therefore lacks the problems associated with the spokes catching foreign objects 
of
In addition , the skirt valve typically lacks a spoke to hold { HEAD ~ the center } of { TAIL ~ the valve } in place , and therefore lacks the problems associated with the spokes catching foreign objects
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH