"escalator barrel" meaning in English

{
  "forms": [
    {
      "form": "escalator barrels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "escalator barrel (plural escalator barrels)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019 October, Dan Harvey, “Crossrail Update: Whitechapel barrels on”, in Modern Railways, page 92:",
          "text": "The escalator barrel up to the concourse is also approaching completion, missing only a few panels and the digital screens that will display ads to those ascending and descending the three escalators.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A sharply inclined shaft or tunnel in which escalators are installed underground, particularly at underground railway stations."
      ],
      "id": "en-escalator_barrel-en-noun-F7pF3N81",
      "links": [
        [
          "shaft",
          "shaft"
        ],
        [
          "tunnel",
          "tunnel"
        ],
        [
          "underground",
          "underground"
        ],
        [
          "railway station",
          "railway station"
        ]
      ]
    }
  ],
  "word": "escalator barrel"
}

{
  "forms": [
    {
      "form": "escalator barrels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "escalator barrel (plural escalator barrels)",
      "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",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2019 October, Dan Harvey, “Crossrail Update: Whitechapel barrels on”, in Modern Railways, page 92:",
          "text": "The escalator barrel up to the concourse is also approaching completion, missing only a few panels and the digital screens that will display ads to those ascending and descending the three escalators.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A sharply inclined shaft or tunnel in which escalators are installed underground, particularly at underground railway stations."
      ],
      "links": [
        [
          "shaft",
          "shaft"
        ],
        [
          "tunnel",
          "tunnel"
        ],
        [
          "underground",
          "underground"
        ],
        [
          "railway station",
          "railway station"
        ]
      ]
    }
  ],
  "word": "escalator barrel"
}