The working medium for heat cycle 1, wherein 1,1 dichloro 2,3,3,3 tetrafluoropropene is contained in a content of {HEAD ~ at least 60 mass %} in {TAIL ~ the working medium} for heat cycle 
The working medium for heat cycle 1 , wherein 1,1 dichloro 2,3,3,3 tetrafluoropropene is contained in a content of { HEAD ~ at least 60 mass % } in { TAIL ~ the working medium } for heat cycle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH