{HEAD ~ A content} of the hydrofluorocarbon is from {TAIL ~ 1 to 60 mass %} in the working medium for heat cycle 
{ HEAD ~ A content } of the hydrofluorocarbon is from { TAIL ~ 1 to 60 mass % } in the working medium for heat cycle
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH