Disclosed is a refrigerator oil composition for use with carbon dioxide refrigerant, characterized in that the composition dissolves in an amount of at least 0. The processor adjusts the phase or power of at least one portion of the radar return data using a steering vector or a tuning vector. The water to be frozen supplied to the water spraying member by a water circulation pump is adapted to be injected into each freezing cell through a water injection hole of each nozzle under the same pressure. The elongate members are directed to the expanded configuration at the target location, and radiation is delivered to treat tissue at the target location, e. The method further includes forming a semiconductor on the gate insulation layer, forming a data line and a drain electrode on the semiconductor and forming a pixel electrode connected to the drain electrode. The third connection surface has a secondary portion connecting a arc-shaped portion of the first connection portion and an inclined portion of the second connection portion.