| 单词 | leaf valve |
| 释义 | > as lemmasleaf valve leaf valve n. †(a) Botany = stoma n. 2 (Obsolete); (b) Mechanics a valve which controls fluid flow by means of a hinged or pivoting flap. ΚΠ 1814 Philos. Mag. 43 81 This causes a momentary vacuum, which opens the innumerable leaf-valves of the plant. 1855 Technologisches Wörterbuch II. 290/2 Leaf valve, Flap valve, Clack-valve, s. (a valve of leather with a hinge joint). 1879 Proc. Royal Soc. 1878–9 28 60 The true relations which subsist between the electrical disturbance, followed by the shutting of the leaf-valves of Dionœa and the latent change of protoplasm which precedes this operation. 1922 Pop. Sci. Monthly Oct. 31/3 It is a good plan, when remodeling the air supply duct, to provide both outside and inside inlets with a leaf valve. 2007 Jrnl. Avian Med. & Surg. 21 32/2 Leaf valves prevented gas flow through the cannulae. < as lemmas |
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