abstract |
A refrigerant containing monofluoroethane, a mineral oil having a% C N of 10 to 60 and a pour point of -15 占 폚 or less in ndM ring analysis, and a synthetic hydrocarbon oil having a pour point of -15 占 폚 or lower as a base oil And having a kinematic viscosity at 40 DEG C of from 3 to 500 mm < 2 > / s. |