Carbon black pneumoconiosis treatments have?
碳黑尘肺的治疗方法有哪些？
The main industry caused by carbon black pneumoconiosis have?
引起碳黑尘肺的主要行业有哪些?。
The production and use of carbon black workers, such as long-term sucked soot dust can produce carbon black pneumoconiosis.
生产和使用碳黑的工人，如长期吸人碳黑粉尘可发生碳黑尘肺。
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