"decompounding" meaning in English

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          "ref": "1961 October, “The first 1,250 h.p. Birmingham/Sulzer Type 2 diesels enter service”, in Trains Illustrated, page 607:",
          "text": "A reverse series field gives a slight decompounding effect and is also used in conjunction with the short-rated starting field when motoring the engine from the battery for starting purposes.",
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        "present participle and gerund of decompound"
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  "word": "decompounding"
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