Jisho

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合金
Wikipedia definition
1. NaKNaK, or sodium-potassium alloy, an alloy of potassium (K) and sodium (Na), is usually liquid at room temperature. Various commercial grades are available. NaK is highly reactive with water and may catch fire when exposed to air, so must be handled with special precautions. Quantities as small as one gram can be a fire or explosion risk.
Read “NaK” on English Wikipedia
Read “ナトリウムカリウム合金” on Japanese Wikipedia
Read “NaK” on DBpedia

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