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