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单词 pointing door
释义

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pointing door
pointing door n. one of a pair of sluice doors which close against each other to form a point, so as to resist the pressure of the water.
ΘΚΠ
the world > the earth > water > lake > pool > [noun] > artificially confined water > contrivance for impounding water > gate, lock, or sluice > other parts of
apron1721
pointing door1744
penstock1763
lock seat1787
rymer1794
trip-sill1905
1744 J. Grundy Scheme for Restoring & Making Navigation River Witham 35 There will be a Necessity for the following stop sluices, with pointing Doors next to the River.
1795 J. Phillips Gen. Hist. Inland Navigation (rev. ed.) Add. 178 A new sea sluice, with pointing doors to sea and land.
1941 Geogr. Jrnl. 97 219 The lodes are fitted either with locks or with timber pointing doors where they enter the main river system.
2001 Inland Waterway Assoc. Bull. Aug. The Environment Agency has announced the replacement of the guillotine gates at Upper Wellingborough and Higham Ferrers Locks on the River Nene, with the more conventional ‘pointing door’ gates.
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更新时间:2024/12/24 21:02:13