동아사이언스

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과학동아 1992년 09호

candleholders that humans scatter around cemeteries. Refrigeration coolants destroy the ozone layer so the Sonic Compressor Systems company hopes to make refrigerators that work by resonating acoustic waves to compress gas. Non-dangerous coolants can then be used because there won't be conventional pistons and lubricants that they would damage. These refrigerators will also be cheaper to run ...