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单词 diffusion hygrometer
释义 diffusion hygrometer
[dǝ`fyü·zhǝn hī`gräm·ǝd·ǝr]
ENGINEERING
A hygrometer based upon the diffusion of water vapor through a porous membrane; essentially, it consists of a closed chamber having porous walls and containing a hygroscopic compound, whose absorption of water vapor causes a pressure drop within the chamber that is measured by a manometer.
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