{HEAD ~ Exemplary mixtures} contain {TAIL ~ dichlorodifluoromethane} and from 35 to 50 percent chloropentafluoroethane, octafluoropropane or octafluorocyclobutane based on the mixtures of I and II 
contain
{ HEAD ~ Exemplary mixtures } contain { TAIL ~ dichlorodifluoromethane } and from 35 to 50 percent chloropentafluoroethane , octafluoropropane or octafluorocyclobutane based on the mixtures of I and II
HEAD HEAD HEAD HEAD HEAD HEAD 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