| 释义 |
over-cut, v.
1. [over- 27.] trans. To fell too many trees in (a forest) at once, upsetting the regular supply of trees suitable for cutting.
1906W. Schlich Man. Forestry (ed. 3) I. v. 75 Private owners are inclined to favour their own monetary interests to the disadvantage of future generations by overcutting..their forests. 1913Q. Rev. Oct. 446 In the case of private ownership, there is always a danger of the forests being overcut to obtain quick returns.
2. Mining. [over- 1.] trans. (See quot. 1967.) Also absol.
1907Trans. Inst. Mining Engin. XXXI. 387 So far as the machine is concerned, it will overcut as well as undercut. 1947Ibid. CVI. 18 The first seam to be overcut with a machine designed specially for roof-forming was the Cockshead Seam in North Staffordshire. 1967Gloss. Mining Terms (B.S.I.) viii. 20 Overcut, to cut by machine at or near roof level in a seam.
3. [over- 27.] intr. To cut or produce a groove in a gramophone record with such amplitude as to run into an adjacent groove.
1935H. C. Bryson Gramophone Record iv. 73 For sounds of constant absolute intensity over the frequency range of 30–250, all the sounds have an equal tendency to over-cut. 1962W. R. Wellman High Fidelity Home Music Syst. (ed. 2) viii. 175 When a recording is made, it is possible for the recording stylus to ‘overcut’, or run into an adjacent groove. 1976Gramophone Sept. 514/3 The audible improvements over the transformer are subtle but very real, totally abolishing my previous reservations about slight sibilance on overcut records with the SL15/Mk. II.
Hence ˌoverˈcutting ppl. a. and vbl. n. Also ˈoverˌcutter, a machine for overcutting.
1923M. & C. Machine Mining II. 283 (caption) A repeat order for overcutting turbine driven universal machines for heading and longwall service. 1928M. D. Williams Pract. Machine Mining iv. 45 The ‘Samson’ chain machine when adapted for overcutting is fitted with a jacking device which permits the raising or lowering of the machine in case of variation in the position of the band to be cut. 1928Daily Tel. 9 Oct. 9/7 Wasteful over-cutting, forest fire, fungi, insects, and wind combined are rapidly wiping out Canada's available trees. 1935H. C. Bryson Gramophone Record iv. 83 If overcutting seems likely to occur, the electrical input of the recorder is cut down to the safety line, i.e., the amplitude is reduced. 1944J. S. Huxley On Living in Revolution xi. 117 Over-cutting of the forests resulted in the closing of its [sc. Elma's] one big mill. 1946Trans. Inst. Mining Engin. CVI. 20 (caption) Overcutting coal-cutter arranged to cut at 7 ft. Ibid. 21 An overcutter was required to cut at 4 ft. 1962W. R. Wellman High Fidelity Home Music Syst. (ed. 2) viii. 175 Overcutting is prevented, during recording, by limiting the swing of the cutting stylus on low frequencies. 1966S. D. Woodruff Methods of Working Coal & Metal Mines III. a. iv. 158 (caption) Hydraulic turret overcutter with down-curved jib for roof cutting. Ibid. 173 The cutting unit consists of a special long-wall coal cutter which is equipped with two horizontal jibs—one for undercutting and the other for overcutting. |
