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Smoke
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--subdivision Combustion under individual materials and types of materials, e.g. Metals--Combustion; and subdivision Motors--Combustion under individual land vehicles and types of land vehicles, e.g. Automobiles--Motors--Combustion
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-- See Also the narrower term Fume control
--subdivision Fume control under types of industries, industrial plants, and processes, e.g. Construction industry--Fume control
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-- See Also the narrower term Smog
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