１４）鋳鋼銑鉄、鋳物製造業　第４表　製品１個当り重量階級機械込比率別生産量延労働時間およびトン当り所要労働時間（鋳鋼）２－１、２－２ １４）鋳鋼銑鉄、鋳物製造業　第４表　製品１個当り重量階級機械込比率別生産量延労働時間およびトン当り所要労働時間（鋳鋼）２－１、２－２

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