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