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註:此參考用圖,主要適用於含碳量0.25%以下的鋼材之肥粒鐵晶粒度的比較法。常用於正常化或退火熱處理後結晶粒度之比對。 |
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* 參考引用規範:JIS G0552:1998 Methods of ferrite grain determination test for steel |
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