GB/T 38396-2019焦化沥青类产品中间相含量的测定光反射显微分析方法标准
英文:Pitch products of coal carbonization—Determination of mesophase content—Microscopical analysis by reflected light GB/...
英文:Pitch products of coal carbonization—Determination of mesophase content—Microscopical analysis by reflected light GB/...