Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... oxygen gases-- Rico district , Colorado .. Cripple Creek district , Colo- rado_ . Rock - strata gases- Utah ... Other localities . Gases in timbered mines .. Properties of gases- Nitrogen ____ Carbon dioxide . Oxygen .. Methane Hydrogen ...
... oxygen gases-- Rico district , Colorado .. Cripple Creek district , Colo- rado_ . Rock - strata gases- Utah ... Other localities . Gases in timbered mines .. Properties of gases- Nitrogen ____ Carbon dioxide . Oxygen .. Methane Hydrogen ...
Side 1
... oxygen where the air is confined in a blind end or in a sealed region . Much more rarely relatively small percentages of ethane or other hydrocarbons with an odor of ether , gasoline , or kerosene , or minute percentages of hydrogen ...
... oxygen where the air is confined in a blind end or in a sealed region . Much more rarely relatively small percentages of ethane or other hydrocarbons with an odor of ether , gasoline , or kerosene , or minute percentages of hydrogen ...
Side 2
... oxygen content is often very low , as the underground metal - mine explosives magazine is usually a dead end , with practically no ventila- tion . In long - standing metal - mine fires , which are rather widely distributed over the ...
... oxygen content is often very low , as the underground metal - mine explosives magazine is usually a dead end , with practically no ventila- tion . In long - standing metal - mine fires , which are rather widely distributed over the ...
Side 4
... OXYGEN GASES Gases high in carbon dioxide or nitrogen , or both , and low in oxygen are likely to be found in long unventilated dead ends in any kind of mine . This sort of atmosphere may be expected ( though it may not always be ...
... OXYGEN GASES Gases high in carbon dioxide or nitrogen , or both , and low in oxygen are likely to be found in long unventilated dead ends in any kind of mine . This sort of atmosphere may be expected ( though it may not always be ...
Side 5
HIGH - NITROGEN AND LOW - OXYGEN GASES 5 are level or approximately level . These low - oxygen atmospheres high in carbon dioxide and nitrogen are formed in mines in numer- ous ways ; although they are more likely to be found in metal ...
HIGH - NITROGEN AND LOW - OXYGEN GASES 5 are level or approximately level . These low - oxygen atmospheres high in carbon dioxide and nitrogen are formed in mines in numer- ous ways ; although they are more likely to be found in metal ...
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Vanlige uttrykk og setninger
activated iodine pentoxide adequate amounts asphyxial asphyxial gases atmosphere Bull Bureau of Mines burning candle carbide lamp carbon dioxide carbon monoxide cent of carbon cent of oxygen Circ circulation of air coal mines combustible material decidedly dangerous deficient in oxygen dioxide and nitrogen dry-bulb temperatures efficiency electric arc explosive gas extinguished fire hazards flame safety lamp found in metal gas mask GASES FOUND gases high GASES IN METAL Gilpin County Harrington high in carbon hydrogen sulphide ignitions of methane inflammable inhaled Investigations killed metal mines metal-mine blasting metal-mine fires miners numerous open light oxides of nitrogen oxygen breathing apparatus oxygen content palladium chloride percentage of carbon poisonous gases PRECAUTIONS AGAINST GASES Pyrotannic Acid Method quantities relative humidity Rept respiratory protection result rock Rock-Strata Gases Sayers SCOTT TURNER shallow shafts strata sulphur dioxide sulphur gases Tech tested tion tunnel type N gas underground United States Bureau unventilated winze workers Yant
Populære avsnitt
Side 5 - ... are a result of the action of atmospheric air and mine water upon the sulphides and carbonates in the fissured rock.
Side 9 - Some of the heaviest losses of life in metal-mine fires have resulted from the burning of less than a railroad freight car or only a few cords of timber.