{HEAD ~ The maximum length}, in the radial direction, of each of the eight adhesion regions disposed in the vicinity of {TAIL ~ the inner or outer peripheral edge} is 0.5 mm 
{ HEAD ~ The maximum length } , in the radial direction , of each of the eight adhesion regions disposed in the vicinity of { TAIL ~ the inner or outer peripheral edge } is 0.5 mm
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH