１２）鉄製錬業　第２表　コークス焼結鉱生産量延直接労働時間およびトン当り直接労働時間１２）鉄製錬業　第２表　コークス焼結鉱生産量延直接労働時間およびトン当り直接労働時間

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The National Archives of Japan's Digital Archive provides access to the descriptions and digitized images of the historical records preserved by the National Archives of Japan. Anytime, anywhere, free...

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