The spinning of coal tar pitch raw material is key procedure of shaping in manufacturing carbon fiber.
煤沥青原料的纺丝，是碳纤维制造过程中加工成型的关键步骤。
To shield themselves from higher raw-material prices, more of them are acquiring their own iron-ore and coal mines or deposits, as well as producers of scrap steel.
为规避原材料涨价的影响，越来越多的钢铁企业自己收购矿山和煤矿或资源储备区，甚至收购废钢企业。
Unshaped active carbon produced through water steaming method with qualified coal as raw material. The products of these are easy in reproduction and strong against pressing.
以优质煤为原料，用水蒸汽法生产的不定型活性炭，具有一定抗压强度，易再生。
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