| natural ventilation |
Ventilation of a mine without the aid of fans or furnaces. Nip Device at the end of the trailing cable of a mining machine used for connecting the trailing cable to the trolley wire and ground.
출처: www.netl.doe.gov/coal/Coal%20Primer/glossary.html
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|---|---|
| natural ventilation |
Ventilation not induced by artificial means.
출처: www.readinganthracite.com/glossary.htm
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| National Institute of Standards and Technology |
(NIST) formally National Bureau of Standards, a federal government agency under Commerce Department, Technology Administration, that has responsibility for weights and measures in the United States.
출처: www.sgia.org/glossary/Nn.cfm
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| natural history |
The study of animals or plants; the sum of the facts about the animals and plants of an area or class.
출처: www.spaceforspecies.ca/glossary/n_o.htm
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| National Institute of Standards and Technology |
New name for National Bureau of Standards.
출처: www.ticms.com/wizard/glossary.htm
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