petroleumn.石油
petroleum metering instruments石油计量仪器
petroleum asphalt roofing felt沥青油毡
petroleum hydrocarbon degraders石油降解菌
petroleum and chemical industry石油化学工业
Petroleum geological conditions石油地质条件
petroleum hydrocarbon pollution石油烃污染
petroleum technological English石油科技英语
petroleum isomerization process石油异构化过程