"condensing" meaning in English

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      "derived": [
        {
          "word": "non-condensing"
        },
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        {
          "ref": "1946 January and February, “The Why and The Wherefore: Condensing Locomotives”, in Railway Magazine, page 62",
          "text": "In Russia, where experiments on a considerable scale have been made with condensing, the railways have the considerable advantage of a loading gauge 17 ft. high (the biggest in the world), as compared with the British 13 ft. or slightly over.",
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        "present participle and gerund of condense"
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          "condense#English"
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  "word": "condensing"
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      "word": "non-condensing"
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