| 单词 |
photoelectric transmissometer |
| 释义 |
photoelectric transmissometer photoelectric transmissometer[¦fōd·ō·i′lek·trik ‚tranz·mə′säm·əd·ər] (engineering) A device to measure the runway visibility at an airport by measuring the degree to which a light beam falling on a photocell is obscured by clouds or fog. |
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