最終更新日：2024/08/01
A diamond of quality too low to be gem-grade but useful in industry, typically as an abrasive, because of its hardness.
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industrial diamond
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A diamond of quality too low to be gem-grade but useful in industry, typically as an abrasive, because of its hardness.
industrial diamond
DiQt（ディクト）
無料
★★★★★★★★★★
