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目前,估计有大约65万人在多粉尘的环境中工作。为防止尘肺发生,规定在作业时要配带附有过滤器的防护口罩。尽管如此,每年仍有大约2千新
Currently, an estimated 650,000 people work in dusty environments. In order to prevent the occurrence of pneumoconiosis, the provisions of the operation to be accompanied by a protective mask with a filter. In spite of this, there are still about 2 thousand new ones each year