Number of Workers of Metal Mines by Sex and Employment Status: Both Sexes, 1890～1940: Estimates of long-term economic statistics of Japan Manpower Table 14-3
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Mining: Staffs, Mining: Miners, Mining: Others, Mining: Total, Refining: Staffs, Refining: Operatives, Refining: Others, Refining: Total, Total: Staffs, Total: Miners & Operatives, Total: Others, Total: Total
数据集包含以下类别：采矿业：员工、采矿业：矿工、采矿业：其他、采矿业：总计，炼油业：员工、炼油业：操作员、炼油业：其他、炼油业：总计，总计：员工、总计：矿工与操作员、总计：其他、总计：总计
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