hard pitch meaning in Chinese
硬焦油脂
硬沥青
Examples
- The properties of expanded polystyrene modified by hard pitch
硬沥青添加改性制备发泡聚苯乙烯研究 - The byproduct of petroleum industry - hard pitch is recommended and the physical and chemical properties are introduced
摘要介绍了一种在石油加工过程中产生的特殊副产物硬沥青。