| 单词 | pan-scratch |
| 释义 | > as lemmaspan-scratch ΘΚΠ the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > [noun] > specific impurities > incrustation > on metal > scale or fur pan-scratch1779 limescale1841 scale1875 scurf1884 scurfing1884 furring1885 birdnesting1893 1779 M. Boulton & J. Watt in E. Robinson & A. E. Musson James Watt & Steam Revol. (1969) 131 If your lime be not of that species which stands water, it will be well to mix some Dutch or Italian terrass, or pan scratch from the salt works with it. 1808 H. Holland Gen. View Agric. Cheshire i. 61 The carbonates of lime, and of iron..subsiding to the bottom,..form an incrustation there, called by the workmen pan-scratch or scale. 1879 Cassell's Techn. Educator (new ed.) IV. 338/1 The carbonate and sulphate of lime..gradually accumulates on the bottom of the pan... This pan-scratch has therefore to be removed periodically. < as lemmas |
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