Examlex
The direction of the magnetic field of a bar magnet is
Underground Machines
No definitive context, but likely refers to equipment used for underground operations such as mining or tunnel construction.
Oil Shale
A fine-grained sedimentary rock containing organic materials that can be processed to produce shale oil, a type of unconventional oil.
Rocky Mountains
A major mountain range in western North America, extending from Canada through the United States.
Sulfur Dioxide
A toxic gas with a sharp, irritating smell, commonly produced by volcanic activity and industrial processes.
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