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ダイヤモンド砥石を中心に、工業材料、生産資材、砥石、研磨材、ダイヤモンドホイールからCBN砥石など研削や研磨に使う工具、加工技術、機械加工にまつわる総合情報サイトです。砥石選びやダイヤモンドホイールの調べ物はこちらへ
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