"rulero" meaning in Spanish

{
  "forms": [
    {
      "form": "ruleros",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "rulero m (plural ruleros)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "2017 August 18, “Javier Delgado: “Estoy realizando mis sueños””, in El Deber Bolivia",
          "text": "Pero siempre atento a lo que hacían las peluqueras, pasaba ruleros, limpiaba los cepillos y me fijaba en cada detalle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "hair roller"
      ],
      "id": "en-rulero-es-noun-yIteBCbT",
      "links": [
        [
          "hair roller",
          "hair roller"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "rulero"
}

{
  "forms": [
    {
      "form": "ruleros",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "rulero m (plural ruleros)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Requests for translations of Spanish quotations",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish nouns",
        "Spanish terms with quotations"
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "2017 August 18, “Javier Delgado: “Estoy realizando mis sueños””, in El Deber Bolivia",
          "text": "Pero siempre atento a lo que hacían las peluqueras, pasaba ruleros, limpiaba los cepillos y me fijaba en cada detalle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "hair roller"
      ],
      "links": [
        [
          "hair roller",
          "hair roller"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "rulero"
}