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单词 pulley wheel
释义

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pulley wheel
pulley wheel n. a grooved wheel of a pulley.
ΚΠ
1665 R. Hooke Micrographia Pref., sig. ev In a convenient place of this is fastened H a pully wheel.
1786 Trans. Amer. Philos. Soc. 2 299 To remedy this, methinks it would be well to have a kind of large pulley wheel..over which the cable might pass.
1868 Times 10 Feb. 10/3 You could not see the pulley wheels revolving as you can in England.
1982 P. Gardner & F. Foden Foxton (BNC) (rev. ed.) 10 The basic principle of the lift is that of two balancing weights positioned on an inclined plane, and suspended by a connecting rope passing over pulley wheels.
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更新时间:2024/12/24 21:49:42