An instrument comprising four lightweight metal vanes, black on one side and white on the other, mounted on a spindle inside a partially evacuated…
| 单词 | θ76058 |
| 释义 | the world > matter > physics > energy or power of doing work > [noun] > change from one to another > instrument illustrating (1) radiometer1875 An instrument comprising four lightweight metal vanes, black on one side and white on the other, mounted on a spindle inside a partially evacuated… |
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