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