rock dusting
/ˈrɒk ˌdʌstɪŋ/North American Mining
noun
The spreading of pulverized rock in a coal mine in order to reduce the risk of coal-dust explosions.
Origin
Early 20th century. From rock dust + -ing. Compare slightly later rock dust.
| 单词 | rock dusting |
| 释义 | rock dusting/ˈrɒk ˌdʌstɪŋ/North American Mining noun The spreading of pulverized rock in a coal mine in order to reduce the risk of coal-dust explosions. Origin |
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