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词汇 rock duster
释义

Definition of rock duster in English:

rock duster

noun ˈrɒk ˌdʌstə
North American Mining

  • A machine which spreads pulverized rock around a coal mine in order to reduce the risk of coal-dust explosions.

Origin

1930s; earliest use found in U.S. Patents. From rock dust + -er.

Definition of rock duster in US English:

rock duster

nounˈrɒk ˌdʌstə
North American Mining

  • A machine which spreads pulverized rock around a coal mine in order to reduce the risk of coal-dust explosions.

Origin

1930s; earliest use found in U.S. Patents. From rock dust + -er.
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