Derivatives from coal pyrolysis - coal tar and pitch based binders and related products : impregnating pitch - characteristics and test methods 煤热解衍生物.煤焦油和沥青基粘合剂和相关产品:浸渍沥青.特性和试验方法
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Derivatives from coal pyrolysis - coal tar and pitch based binders and related products - impregnating pitch - characteristics and test methods 煤热解衍生物.煤焦油和沥青基粘结剂和相关产品.浸渍沥青.特性和试验方法