| 单词 | photoelectric densitometer |
| 释义 | photoelectric densitometer [¦fōd·ō·i`lek·trik ´den·sǝ`täm·ǝd·ǝr] 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. |
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