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