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BS 942:1941
Formulae for calculating intensities of lighthouse beams and beams from cognate projection apparatus.
No description.
Technical characteristics
| Publisher | British Standards Institution (BSI) |
| Publication Date | 02/17/1941 |
| Page Count | 0 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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Previous versions
17/02/1941
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