"vulcanizer" meaning in English

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      "expansion": "From vulcanize + -er.",
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  "etymology_text": "From vulcanize + -er.",
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      "form": "vulcanizers",
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        "Equipment used for the vulcanization of rubber."
      ],
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        "A substance (such as sulfur) added to rubber during this process."
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        "A person employed to vulcanize rubber."
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  "word": "vulcanizer"
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  "etymology_text": "From vulcanize + -er.",
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      "form": "vulcanizers",
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        "Equipment used for the vulcanization of rubber."
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