| 释义 |
ˌover-ˈpole, v.
Chiefly in pa. pple. over-poled.
[f. over- 27 + pole v.1]
1. trans. To furnish (hops, or a hop-ground) with too long a pole or poles.
1707Mortimer Husb. 135 The Hop will soon run itself out of heart if over-poled: more especially be sure not to over-pole them for length the first Year.
2. To pole (copper) too much in refining, so as to remove too much oxide and render it brittle.
1861etc. [see overpoled, overpoling below].
Hence overˈpoled ppl. a., overˈpoling vbl. n.
1742W. Ellis Mod. Husbandman Aug. xx. 98 Over-poling [of hops] is worse than Under-poling. 1758R. Brown Compl. Farmer ii. (1760) 113 Neither can you expect a crop [of hops] from an over-poled ground. 1861J. Percy Metallurgy 274 One of the most characteristic properties of commercial overpoled copper is brittleness. 1890Sci. Extracts 171 The terms, underpoling, overpoling, and tough pitch. Ibid., The removal of this small quantity of oxygen will suffice to render copper overpoled and useless. 1910Jrnl. Inst. Metals IV. 207 In the case of ‘overpoled’ copper the gases were released in such a quantity as to not only neutralise the effect of shrinkage, but to elevate the surface of the ingot. Ibid. 230 ‘Poling’ could be pushed further, before the stage of ‘overpoling’ was reached, than could be done in the case of pure copper. 1930Ibid. XLIII. 121 Hence a very slight further poling beyond the point A will cause a marked increase in the porosity of the ingot; the surface will rise and all the defects of overpoling will appear. 1937Archbutt & Prytherch Effect of Impurities in Copper iii. 34 Overpoled metal is not in a satisfactory condition to withstand rolling and fabrication for two reasons. 1949J. E. Garside Process & Physical Metall. xxii. 378 If poling has been too prolonged the cuprous oxide content is very low. This gives rise to the evolution of considerable quantities of water vapour on solidification and the metal expands in the mould, forming a ridge. Such material, too brittle for many purposes, is termed ‘overpoled copper’. |