| 单词 | picking-bed |
| 释义 | > as lemmaspicking-bed picking-bed n. a bed in a quarry that may be or has been picked away. ΘΚΠ the world > the earth > minerals > mineral deposits > [noun] > stratum or bed > bed of stone or sand pendle1706 picking-bed1749 sand1849 1749 J. Wood Ess. Descr. Bath (ed. 2) II. 431 The next Layer under it, commonly called the Picking Bed, is generally as much Softer than the good Free Stone, as the Ragg is Harder. 1883 Stonemason Jan. Of this the top 12 inches is used as a picking-bed, so that blocks 6½ feet deep can always be obtained when required. < as lemmas |
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