Encara no tenim significats per a "artificial refrigeration".
1Some present-day systems of artificial refrigeration (Section 93) could not exist without the aid of compressed gases.
2These huge brick-lined wells were built in the 19th century to store ice, before the invention of artificial refrigeration.
3The second door opened into a room which he discovered was colder than the night outside, evidently the result of artificial refrigeration.
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