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