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单词 spectral hygrometer
释义 spectral hygrometer
[`spek·trǝl hī`gräm·ǝd·ǝr]
ENGINEERING
A hygrometer which determines the amount of precipitable moisture in a given region of the atmosphere by measuring the attenuation of radiant energy caused by the absorption bands of water vapor; the instrument consists of a collimated energy source, separated by the region under investigation and a detector which is sensitive to those frequencies that correspond to the absorption bands of water vapor.
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