"pulley block" meaning in English

{
  "forms": [
    {
      "form": "pulley blocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pulley block (plural pulley blocks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1946 January and February, “Notes and News: Demolition of Rhydyfelin Viaduct”, in Railway Magazine, page 53",
          "text": "The next stage entailed toppling-over each girder into the river by means of hand-winches and pulley-blocks.",
          "type": "quotation"
        },
        {
          "ref": "2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, page 87",
          "text": "In 1799 he [Marc Brunel] designed a machine to make pulley blocks for the British Navy ... who turned out not to be good payers.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A shell containing one or more sheaves, the whole forming a pulley."
      ],
      "id": "en-pulley_block-en-noun-jWnIsuoJ",
      "links": [
        [
          "shell",
          "shell"
        ],
        [
          "sheaves",
          "sheaf"
        ],
        [
          "pulley",
          "pulley"
        ]
      ]
    }
  ],
  "word": "pulley block"
}

{
  "forms": [
    {
      "form": "pulley blocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pulley block (plural pulley blocks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1946 January and February, “Notes and News: Demolition of Rhydyfelin Viaduct”, in Railway Magazine, page 53",
          "text": "The next stage entailed toppling-over each girder into the river by means of hand-winches and pulley-blocks.",
          "type": "quotation"
        },
        {
          "ref": "2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, page 87",
          "text": "In 1799 he [Marc Brunel] designed a machine to make pulley blocks for the British Navy ... who turned out not to be good payers.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A shell containing one or more sheaves, the whole forming a pulley."
      ],
      "links": [
        [
          "shell",
          "shell"
        ],
        [
          "sheaves",
          "sheaf"
        ],
        [
          "pulley",
          "pulley"
        ]
      ]
    }
  ],
  "word": "pulley block"
}