Engineering. An aperture or passage through which water may pass in a valve or other mechanism, esp. considered in respect of its cross-sectional…
单词 | θ214302 |
释义 | society > occupation and work > equipment > machine > parts of machines > control(s) > [noun] > valve > full-open area in (1) waterway1729 Engineering. An aperture or passage through which water may pass in a valve or other mechanism, esp. considered in respect of its cross-sectional… |
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