| 单词 | high breast |
| 释义 | > as lemmashigh breast high breast adj. now chiefly historical (of a waterwheel) = pitch-back adj.; cf. breast wheel n. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [adjective] > driven by water from above or below overshotc1535 undershoot1602 undershot1610 pitch-back1825 high breast1833 1795 O. Evans Young Mill-wright & Miller's Guide i. 107 Given, a high breast-wheel,..where the water is shot on at d.] 1833 W. Templeton Millwright & Engineer's Pocket Compan. (ed. 2) 112 Example 2—Given 16 cubic feet of water per second, to be applied to a high breast, or an overshot wheel, with 2 feet head, and 10 feet fall; required the power. 1880 Encycl. Brit. XII. 523/2 With greater variation of head-water level, a pitch-back or high breast wheel is better. 1904 M. L. Taylor in G. D. Harris Underground Waters Southern Louisiana (U.S. Geol. Surv.) 82 A high breast wheel 24 feet in diameter develops the power under a head of 22 feet. 2013 K. W. Wright Hist. Andover Ironworks 37 This primitive pipe..supplied water to a wooden trough called the penstock, where sluice gates regulated the flow to a high-breast water wheel. < as lemmas |
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