Coal tar processing is one of the most important areas of coal chemical technology and a main intermediate ring binding coal mining, metallurgy and chemical industry.
煤焦油加工是煤化工的重要内容之一，与煤炭、冶金和化工等行业密切相关，在世界范围内已有相当规模。
There is often dust pollution in environments of coal mining, cement production, flour processing and pharmaceutical factory etc.
煤矿开采、水泥生产、面粉加工、制药等行业长期受到粉尘污染的困扰。
Gangue, which is a waste from the processing of coal-mining production, has despoiled plenty of land and become one of the largest solid wastes in China.
煤矸石是在煤炭开采过程中产生的废弃物，侵占了大量土地资源，已经成为我国排放量最大的固体废弃物之一；
Gangue, which is a waste from the processing of coal-mining production, has despoiled plenty of land and become one of the largest solid wastes in China.
煤矸石是在煤炭开采过程中产生的废弃物，侵占了大量土地资源，已经成为我国排放量最大的固体废弃物之一；
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