Pulverized rock, esp. (in later use) as spread in coal mines in order to reduce the risk of coal-dust explosions.
| 单词 | θ214872 |
| 释义 | society > occupation and work > materials > raw material > stone or rock > [noun] > pulverized stone for use in mines (1) rock dust1816 Pulverized rock, esp. (in later use) as spread in coal mines in order to reduce the risk of coal-dust explosions. |
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