| 单词 | propeller fan |
| 释义 | > as lemmaspropeller fan propeller fan n. a fan incorporating a device resembling a screw propeller, which rotates to produce a flow of air parallel to the axis of rotation; esp. one in which the propeller is not enclosed, or else is enclosed in a very short casing that does not restrict the air flow. ΘΚΠ the world > matter > gas > air > fresh air > [noun] > supplying fresh air or ventilation > fan > rotating vane1810 fan1835 propeller fan1850 1850 Sci. Amer. 12 Oct. 28/1 Attached to this car there are two propeller fans, one on each side. 1897 Inst. Mech. Engineers: Proc. 469 The propeller fan was for volume of air without compression, the centrifugal for volume with compression. 1991 A. Macneill Alistair MacLean's Time of Assassins i. 7 The two large propeller fans still rotated slowly above the room. < as lemmas |
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