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单词 θ205909
释义
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > propulsion machinery > [noun] > propeller > types of (4)
screw propeller1835

(originally) a device for propelling a ship or boat, consisting of a helical surface or blade winding around a shaft that is turned by a piston…

screw1839

Originally: a device for propelling a ship or boat, consisting of a helical surface or blade winding around a shaft that is turned by a piston; (in…

reversing propeller1849

a reversible propeller; cf. reversible, adj. 1c.

contrapropeller1927

One of a pair of propellers having concentric shafts and rotating in opposite directions; a contra-rotating propeller.

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