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Francis Jehl
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Menlo Park reminiscences
Francis Jehl, Francis Jehl · Kessinger Publishing
454 sayfa · 1936
Biography / Inventors / Edison, thomas a. (thomas alva), 1847-1931
Incandescent Electric Lights: With Particular Reference to the Edison Lamps ...
Théodose Achille Louis comte Du Moncel, William Henry Preece, John White Howell, Francis Jehl, Charles William Siemens · D. Van Nostrand
Sayfa sayısı yok · 1882
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Incandescent electric lights
Du Moncel, Th. comte, William Henry Preece, Francis Jehl, John W. Howell, Siemens, Charles William Sir · D. Van Nostrand company
187 sayfa · 1882
Incandescent lamps