The main industry caused by carbon black pneumoconiosis have?
引起碳黑尘肺的主要行业有哪些?。
Coal worker's pneumoconiosis results from inhalation of coal dust.
煤炭工人的煤尘肺是由吸入煤矿粉尘引起。
Objective To study the influence of different coal ranks on the prevalence of pneumoconiosis.
目的探讨不同煤质煤尘对尘肺患病的影响。
Objective To study the influence of different coal ranks on the prevalence of pneumoconiosis.
目的探讨不同煤质煤尘对尘肺患病的影响。
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