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Pulse-forming circuitry for explosives research

Effect of weather on sound transmission from explosive shots

Miniature bilevel alarm for oxygen-deficient atmospheres

Miniature oxygen deficiency alarm

Bureau of Mines portable recording methanometer

Laser alinement sensor for continuous-mining machines

Published Year

• 1960-1969 (5)
• 1970-1979 (1)

Subject

• Mine ventilation (2)
• Air sampling devices (1)
• Coal-mining machinery (1)
• Explosives (1)
• Explosives--Testing (1)
• Lasers in mining (1)
• Methane (1)
• Mine safety--Equipment and supplies (1)
• Noise pollution--Meteorological aspects (1)
• Oxygen (1)
• Sound--Transmission (1)

Author

• Bowser, Merle L. (6) *
• Bradburn, Robert A. (2)
• Gibson, Frank C. (1)
• Grant, R. L. (1)
• Murphy, John N. (1)
• Thomas, William E. (1)

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