| 释义 |
adjustable, a.|əˈdʒʌstəb(ə)l|
[f. adjust + -able.]
Capable of being adjusted. adjustable pitch: freq. attrib. (with hyphen), applied to an aeroplane propeller the blade angle of which can be adjusted when the engine is at rest (opp. variable pitch). Also absol., a pitch setting capable of such adjustment.
1775Maskelyne in Phil. Trans. LXV. 500 Which wanted nothing to make it an excellent instrument but to have the plumb-line made adjustable. 1795Sir W. Herschel in Phil. Trans. LXXXV. 388 The plate on the west is fixed, but that on the east is adjustable. 1832Babbage Econ. Manuf. 27 The opening of the valve..being adjustable at the will of the engine-man. 1851–9Sir J. Herschel in Man. Sci. Enq. 126 The lower level [of the mercury] in the cistern is adjustable to contact with a steel or ivory fiducial point. 1909Car 5 May 451/1 Look to your propeller which..has an adjustable pitch. 1934Flight 15 Feb. 156/1 The airscrews are of the three-bladed adjustable-pitch type. 1949Gloss. Aeronaut. Terms (B.S.I.) ii. 19 Adjustable-pitch propeller, a propeller, the blades of which can be adjusted to a desired pitch when not rotating. |