A paving material of tar and broken stone; mixed in a factory and shaped during paving.
柏油和碎石制成的铺路材料；在制造厂和铺路期间混合。
The acidic coal tar from rude benzene refining is always the problem of the coking factory, this paper summed up whose comprehensive utilization in new method and new process.
粗苯精制工艺产生的酸焦油，一直是困扰焦化厂的问题，综述了其综合利用的新方法、新工艺。
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