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