THM, Thm, thm or ThM may refer to:
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Turbo-Hydramatic, GM vehicle transmission
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Ton of heavy metal in a nuclear power plant
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Ton of hot metal in the steel industry
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Trihalomethanes in chemistry
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Therm, a unit of heat energy
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Technische Hochschule Mittelhessen—University of Applied Sciences
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Master of Theology postnominal, ThM
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