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Subject
- Petroleum pipelines36
- Natural gas pipelines18
- Oil fields17
- Petroleum refineries15
- Gas fields14
- Natural gas8
- Petroleum7
- Gas pipelines4
- Petroleum shipping terminals4
- Maps3
- Petroleum industry and trade3
- Cartes2
- Electric power distribution2
- Fossil fuels2
- Gas industry2
- Hydrocarbures2
- Oil and gas leases2
- Real property2
- World maps2
- Boundaries1