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