Abrasives - Toryu
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Hard particles used in polishing. There are alumina-based abrasive grains (alundum) suitable for iron-based materials such as steel and hardened steel, and silicon carbide-based abrasive grains (carborundum) suitable for hard but brittle materials such as stone and cast iron. Source: About Shogakukan Digital Daijisen Information | Legend |
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研磨に用いる硬い粒子。鉄鋼や焼入れ鋼などの鉄系材質に向くアルミナ系砥粒（アランダム）、石や鋳鉄といった硬くてもろい材質に向く炭化ケイ素系砥粒（カーボランダム）などがある。
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