Etymology of KF94

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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        "2": "Korean Filter with 94% filtration efficiency"
      },
      "expansion": "Initialism of Korean Filter with 94% filtration efficiency"
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    ],
    [
      "efficiency",
      "efficiency#English"
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  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "An air particulate filtration standard originating in the Republic of Korea, South Korea, which requires filtration of 94% of air particulates.",
        "Ellipsis of KF94 filter, a filter implementing the standard.",
        "Ellipsis of KF94 mask, a facemask using a filter conforming to the standard."
      ],
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