单词：coaltar pitch
coaltar pitch的用法和样例：
例句
- Mesophase microbeads were prepared from coal tar pitch by thermal condensation in atmospheric pressure.以煤焦油沥青为原料采用常压热缩聚工艺制备中间相沥青微球。
- Boron-substituted polyaromatic mesophase was prepared by co-pyrolysis of a coal tar pitch with pyridine-borane complex under autogeneous pressure.以煤焦油沥青和吡啶硼烷为原料采用加压热缩聚工艺制备硼取代聚芳烃中间相沥青。
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