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The use of Refrigerant-22(R-22) for temperatures below –300C is not recommended due to its 

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The use of Refrigerant-22(R-22) for temperatures below –300C is not recommended due to its 

      (a) good miscibility with lubricating oil

      (b) poor miscibility with lubricating oil

      (c) low evaporating temperature

      (d) high compressor discharge temperature

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