"counter shaft" meaning in English

{
  "forms": [
    {
      "form": "counter shafts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "counter shaft (plural counter shafts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "countershaft"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1950 July, “Diesel Train Services for G.N.R.(I.)”, in Railway Magazine, page 490",
          "text": "The drive from the engine is taken through a fluid flywheel and universally jointed shaft to the counter-shaft and thence to a five-speed preselective type epicyclic gearbox by another shaft.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of countershaft."
      ],
      "id": "en-counter_shaft-en-noun-15JPQP9S",
      "links": [
        [
          "countershaft",
          "countershaft#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "counter shaft"
}

{
  "forms": [
    {
      "form": "counter shafts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "counter shaft (plural counter shafts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "countershaft"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1950 July, “Diesel Train Services for G.N.R.(I.)”, in Railway Magazine, page 490",
          "text": "The drive from the engine is taken through a fluid flywheel and universally jointed shaft to the counter-shaft and thence to a five-speed preselective type epicyclic gearbox by another shaft.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of countershaft."
      ],
      "links": [
        [
          "countershaft",
          "countershaft#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "counter shaft"
}