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Kongsberg Silver Mines
The silver mines of Kongsberg, in Buskerud county in Norway, constitute the largest mining field in Norway, with over 80 different mines. It was the largest pre-industrial working place in Norway, with over 4,000 workers at its peak in the 1770s and supplied over 10% of the gross national product of the Danish-Norwegian union during its 335-year-long history: over 450,000 man-years were expended in the production.
The town of Kongsberg houses the Norwegian Mining Museum, which houses collection of silver, tools, and machinery utilised by the miners, engineers, and doctors.
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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