(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…
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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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