petroleum rig石油钻机
petroleumn.石油
Petroleum concentration石油类污染
petroleum drilling tool石油钻具
petroleum pipeline unit输油管线部队
petroleum refining unit炼油装置
petroleum microorganism石油微生物
petroleum oil herbicide石油除草剂
petroleum installations石油设施
Petroleum pipeline steel石油管线钢
petroleum reserve system石油储备体系
petroleum pollutant soil石油污染土壤