| 单词 | hydrometric pendulum |
| 释义 | > as lemmasHydrometric pendulum ‘ Hydrometric pendulum, a current-gage. An instrument consisting of a ball suspended from the center of a graduated quadrant, and held in a stream to mark by its deflection the rate of motion of the water’ (E. H. Knight Pract. Dict. Mech. 1875).extracted from hydrometricadj.< as lemmas |
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