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- Date:
- 1942
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- May 02, 2025
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- current is not available, therefore cannot use synchronous motors driven by the supply line
- Date:
- 1942
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- May 02, 2025
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- fold it so that it forms a pad 6 inches long by two inches wide. Dampen and press down
- Date:
- 1942
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- May 02, 2025
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- through the body of the carbon, thus avoiding heating the carbon by resistance. This has two
- Date:
- 1935
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- May 02, 2025
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- for easily.
(149) High bars may be detected ordinarily by a slight clicking sound when
- Date:
- 1935
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- May 02, 2025
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- the carbon by resistance. This has two other advantages. Since the positive is non-rotating
- Date:
- 1942
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- May 02, 2025
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- aperture. It may be defined as a cone of light bounded by straight lines drawn from the
- Date:
- 1935
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- May 02, 2025
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- LENSES AND MIRRORS 93
— 27. By what means are lenses corrected ?
28. What is a
- Date:
- 1935
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- May 02, 2025
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- combination of lenses by means of which light is collected from a light source and concentrated
- Date:
- 1942
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- May 02, 2025
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- 424 RICHARDSON'S BLUEBOOK OF PROJECTION
atre can sometimes be located by timing the
- Date:
- 1942
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- May 02, 2025
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- efficient and speedy location of sound system troubles encountered by projectionists in their