| 单词 | wall-rock |
| 释义 | > as lemmaswall-rock wall-rock n. Mining the rock forming the walls of a vein. ΘΚΠ the world > the earth > minerals > mineral deposits > features of stratum or vein > [noun] > material forming sides ouge1666 gouge1877 wall-rock1877 1877 R. W. Raymond Statistics Mines & Mining 349 On it a shaft has been sunk..showing a continuous vein with well-defined wall-rock. < as lemmas |
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