Checking, calibration and maintanace of photogrammetric instruments
The' -photographic and' photographically laboratories and work 'areas are temperature controlled-at 72 Fahrenheit - 2 degrees through the'"use- of: forced-air cooling and heating "systems equipped filters f or removing:-dust.' The ^relative humidity is held at 50 percent - 5 percent:; to' maintain the metric stability of plastic materials and to prevent commission's:'and rust of the photo grammatical instruments';
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| Format: | Working paper biblioteca |
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| Language: | eng |
| Published: |
196609
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| Online Access: | http://hdl.handle.net/10855/15069 |
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