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