"spark testing" meaning in English

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        "A method of determining the general classification of ferrous materials that normally requires taking a piece of metal, usually scrap, to a grinding wheel and observing the sparks emitted."
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          "english": "v.",
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          "sense": "A method of determining classification of ferrous materials.",
          "word": "Funkenprobe"
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        "present participle and gerund of spark test"
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