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