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1984年我们调查了红安萤石矿的劳动卫生条件,结果如下: 劳动卫生调查 该矿原是露天开采的小型矿,1971年转入井下
In 1984, we surveyed the working conditions of Hong’an fluorite mine. The results are as follows: Labor hygiene survey The mine was originally a small open-pit mine that was turned into a well in 1971