Carbon or {HEAD ~ graphite} may be used in {TAIL ~ conjunction} with or instead of silicon carbide powder or other materials inert to the electrolyte used in the cell 
used in
Carbon or { HEAD ~ graphite } may be used in { TAIL ~ conjunction } with or instead of silicon carbide powder or other materials inert to the electrolyte used in the cell
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH