"FFF" meaning in English

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  "lang_code": "en",
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        "(printing) Initialism of fused filament fabrication."
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          "extra": "a humorous system of units based on unusual or impractical measurements",
          "word": "furlong–firkin–fortnight"
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        "Initialism of furlong–firkin–fortnight (“a humorous system of units based on unusual or impractical measurements”)."
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          "furlong",
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          "firkin",
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          "fortnight",
          "fortnight#English"
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  "lang_code": "en",
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