oil pitch的用法和樣例：
例句
- A pitch mesophase can be prepared from petroleum pitch andcoal tar pitch.
從石油瀝青和煤瀝青中製取瀝青中間相物質。 - This article mainly introduces the preparation of petroleum pitch coal additive agent and the slurrying ability of coal on adding petroleum pitch.
主要介紹了石油瀝青水煤漿添加劑的製備和在煤中摻入石油瀝青的製漿性能。
