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单词 sight tube
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sight tube
sight tube n. (a) a tube through which observations are made; (b) a transparent tube connected to a tank or cistern so as to display the level of the liquid inside it.
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the world > physical sensation > sight and vision > optical instruments > instruments for observing > [noun]
sight tube1851
shufti-scope1948
the world > relative properties > measurement > measuring instrument > [noun] > for measuring level in a container
dipstick1824
sight tube1851
dip-rod1923
1851 H. Melville Moby-Dick cxxiv. 571 The crushed copper sight-tubes of the quadrant.
1859 Times 7 Jan. 8/4 He can enter an enemy's harbour under water and make surveys, only showing above the surface a sight tube, no more than one half inch in diameter, and retire still under water.
1900 W. M. Stine Photometrical Measurements iii. 77 Adjust the telescopic sight tube until the different portions of the field are sharply outlined.
1905 Motor Manual (ed. 7) iv. 78 The oil..enters a series of sight tubes.
1951 Proc. Physical Soc. B. 64 49 The level of the liquid in the annular gap can be deduced from observations of its level in a vertical sight-tube attached to the filling apparatus.
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更新时间:2025/1/31 7:26:23