remining of placer gold 砂金复采
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The experience of remining placer gold in Laozuoshan Gold Mine in the past 5 years was introduced. The interior management and technical reform of the gold dredge were summarized.
介绍了老柞山金矿5 年来砂金复采所取得的经验，并对采金船的内部管理以及采金船的技术改造进行了总结。
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