| D011890 |
Railroads |
Permanent roads having a line of rails fixed to ties and laid to gage, usually on a leveled or graded ballasted roadbed and providing a track for freight cars, passenger cars, and other rolling stock. Cars are designed to be drawn by locomotives or sometimes propelled by self-contained motors. (From Webster's 3d) The concept includes the organizational and administrative aspects of railroads as well. |
Subways,Railroad,Subway |
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| D004864 |
Equipment and Supplies |
Expendable and nonexpendable equipment, supplies, apparatus, and instruments that are used in diagnostic, surgical, therapeutic, scientific, and experimental procedures. |
Apparatus and Instruments,Devices,Medical Devices,Device, Medical,Devices, Medical,Equipment,Inventories,Medical Device,Supplies,Device,Instruments and Apparatus,Inventory,Supplies and Equipment |
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| D000336 |
Aerosols |
Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents. |
Aerosol |
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| D000393 |
Air Pollutants |
Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or materials. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS. |
Air Pollutant,Air Pollutants, Environmental,Environmental Air Pollutants,Environmental Pollutants, Air,Air Environmental Pollutants,Pollutant, Air,Pollutants, Air,Pollutants, Air Environmental,Pollutants, Environmental Air |
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| D001335 |
Vehicle Emissions |
Gases, fumes, vapors, and ODORANTS escaping from the cylinders of a gasoline or diesel internal-combustion engine. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Random House Unabridged Dictionary, 2d ed) |
Automobile Exhaust,Diesel Exhaust,Engine Exhaust,Vehicle Emission,Vehicular Emission,Traffic-Related Pollutants,Transportation Emissions,Vehicular Emissions,Emission, Vehicle,Emission, Vehicular,Emissions, Transportation,Emissions, Vehicle,Emissions, Vehicular,Exhaust, Automobile,Exhaust, Diesel,Exhaust, Engine,Pollutants, Traffic-Related,Traffic Related Pollutants |
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| D014186 |
Transportation |
The means of moving persons, animals, goods, or materials from one place to another. |
Commuting |
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| D014586 |
USSR |
A country located from the Baltic and Black seas to the Pacific Ocean and, for a time including 15 Soviet Socialist Republics. The capital was Moscow. |
Soviet Union,Union of Soviet Socialist Republics |
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