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