oil pitch的用法和样例：
例句
- A pitch mesophase can be prepared from petroleum pitch andcoal tar pitch.
从石油沥青和煤沥青中制取沥青中间相物质。 - This article mainly introduces the preparation of petroleum pitch coal additive agent and the slurrying ability of coal on adding petroleum pitch.
主要介绍了石油沥青水煤浆添加剂的制备和在煤中掺入石油沥青的制浆性能。
