| 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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| D006801 |
Humans |
Members of the species Homo sapiens. |
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man |
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| D012426 |
Russia |
A country located in north Asia bordering the Arctic Ocean, extending from Europe (the portion west of the Urals) to the North Pacific Ocean. The capital is Moscow. |
Russian S.F.S.R.,Russian Federation (Europe),Russian SFSR |
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| D012449 |
Safety |
Freedom from exposure to danger and protection from the occurrence or risk of injury or loss. It suggests optimal precautions in the workplace, on the street, in the home, etc., and includes personal safety as well as the safety of property. |
Safeties |
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| D012499 |
Sanitation |
The development and establishment of environmental conditions favorable to the health of the public. |
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| D012800 |
Siberia |
A region, north-central Asia, largely in Russia. It extends from the Ural Mountains to the Pacific Ocean and from the Arctic Ocean to central Kazakhstan and the borders of China and Mongolia. |
Russian S.F.S.R., Asian,Russian Federation (Asia) |
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| D016272 |
Occupational Health |
The promotion and maintenance of physical and mental health in the work environment. |
Employee Health,Industrial Health,Industrial Hygiene,Occupational Safety,Health, Industrial,Hygiene, Industrial,Safety, Occupational,Health, Employee,Health, Occupational |
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