| 单词 |
photoelectric densitometer |
| 释义 |
photoelectric densitometer photoelectric densitometer[¦fōd·ō·i′lek·trik ‚den·sə′täm·əd·ər] (engineering) An electronic instrument used to measure the density or opacity of a film or other material; a beam of light is directed through the material, and the amount of light transmitted is measured with a photocell and meter. |
| 随便看 |
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