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单词 self-dropping
释义

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self-dropping
self-dropping adj.
Brit. /ˌsɛlfˈdrɒpɪŋ/
,
U.S. /ˌsɛlfˈdrɑpɪŋ/
(of a machine or device) that causes something to drop out automatically when required; (of a door, shutter, etc.) that drops down automatically.
ΚΠ
1863 Burlington (Iowa) Daily Hawk-eye 9 Mar. (advt.) A new Corn Planter, self dropping, for sale.
1910 Times 6 July 17 Windows might have..self-dropping shutters of rolled-up metal or asbestos.
1961 G. Farwell Vanishing Australians xi. 149 Best way [of trapping alligators] is to build a yard with a self-dropping door, then sling a big hunk of stale meat inside.
2005 S. Luo & J. Zheng in Z. Yu et al. 1st Internat. RILEM Symp. Design, Performance & Use Self-consolidating Concrete lxvii. 638 Now the self-dropping mixers are popular, especially for above strengthening projects with less amounts of concrete.
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