| 释义 |
grader|ˈgreɪdə(r)|
[f. grade v.2 + -er1.]
1. A person employed:
a. in grading produce (see grade v.2);
b. in grading roads (see grade v.2 4).
a.1889Columbus (Ohio) Dispatch 22 Nov., Graders whose business is to classify cotton for English markets. 1893Westm. Gaz. 7 Mar. 9/3 The wool was duly delivered..and a large number of graders put to work preparing it for cleaning.
b.1870Times 5 Sept. 5 Track-laying will be commenced next week, and will be pushed forward after the graders as fast as the iron is received. 1883W. H. Bishop in Harper's Mag. 825/2 The grader of streets will probably follow the..mining capitalist.
2. A machine for ‘grading’ (in various senses).
1868Rep. U.S. Commissioner Agric. (1869) 361 The side tracks [should be] kept in order by the use of the grader. [Plate, Improved Rut Scraper and Grading Machine.] 1884Knight Dict. Mech. Suppl., Grader (Railway). A temporary track is laid, and from a platform and caboose car on this track a double plow is rigged out to throw up a track. Ibid., Grader, an earth scraper. 1888Wine, Spirit & Beer 8 Mar. 142/2 The machine consists of two separate frames, one containing the half-corn separator, feed-hopper and elevator, and the other the grader. 1953R. J. C. Atkinson Field Archaeol. (ed. 2) ii. 58 For stripping large areas a bulldozer or grader is to be preferred. 1963A. Lubbock Austral. Roundabout 11 The roads are kept up by a ‘grader’, a kind of steamroller with a wide scraper attached in front. 1963Field Archaeol. (Ordnance Survey) (ed. 4) 14 When a grader is removing topsoil as a preliminary to the extension of a chalk pit it may reveal ditches, post-holes, beam slots, rubbish pits [etc.]. 1971Timber Trades Jrnl. 21 Aug. 26/2 No grading machine is in operation at present in Sweden, but the major sawmillers are actively studying the potential offered by machine graders. |