Safety Lamp
Hawkins' Electrical Dictionary · 1915 · p. 3
—aAn incandescent lamp specially designed for use in mines and similar places where there is danger of fire damp or other explosive conditions.
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
Nuttall Encyclopedia (1907)
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Pears Shilling Cyclopedia (1898)
Safety-lamp
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Zell's Condensed Dictionary (1879)
A Dictionary of Arts, Manufactures and Mines (1840)
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Adair's New Encyclopedia (1923)
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A Concise Anglo-Saxon Dictionary (1916)
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The Slang Dictionary Etymological Historical and Anecdotal (1913)
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Everybody's Encyelopedia (1912)
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Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
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Chamber's Twientieth Century Dictionary (1908)
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Chamber's Twientieth Century Dictionary (1908)
Davy
—
Pears Shilling Cyclopedia (1898)
DAVY
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Modern English Biography (1892)
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Illustrated Marine Encyclopedia (1890)
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