A varistor or {HEAD ~ rectifier} having {TAIL ~ the structure} of the invention is improved in these characteristics 
having
A varistor or { HEAD ~ rectifier } having { TAIL ~ the structure } of the invention is improved in these characteristics
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH