{HEAD ~ Outward} of {TAIL ~ central portion 44b disk shaped area} 44 is penetrated desirably by a plurality of oblong or kidney shaped through holes 44c 
of
{ HEAD ~ Outward } of { TAIL ~ central portion 44b disk shaped area } 44 is penetrated desirably by a plurality of oblong or kidney shaped through holes 44c
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH