FIELD: floated-type gyroscope instrument making. SUBSTANCE: described is new supporting perfluorocarbon-based liquid composition for floated-type gyroscopes. Perfluorocarbon is perfluorocarbon of formula CF2n = 15-18 wherein n is 15-18 with average molecular weight of 820 and perfluoropropylvinyl ether tetrafluoroethylene of general formula: 
wherein X is 24-28 mole %, y is 72-76 mole %, ratios of composition components, being as follows wt %: perfluorocarbon, 72-75; perfluoropropylvinyl ether, tetrafluoroethylene copolymer, the balance. EFFECT: null floatability and high damping properties of floated-type gyroscope. 6 ex
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