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Uranium Isotope
Variants of the element uranium that contain the same number of protons but different numbers of neutrons in their nuclei, with different isotopes having different nuclear properties.
Radioactive Material
Substances that emit radiation as a result of the spontaneous disintegration of atomic nuclei.
Strip Mines
Large, open-pit mines where layers of soil and rock are removed to access underlying minerals.
Underground Machines
No definitive context, but likely refers to equipment used for underground operations such as mining or tunnel construction.
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