Last Updated：2025/12/07
The metallurgist examined the polished section and identified ledeburite at the grain boundaries.
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The metallurgist examined the polished section and identified ledeburite at the grain boundaries.
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その冶金学者は研磨断面を調べ、粒界に炭素約4.3%を含む鉄の共晶組織を確認した。
