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| 岩粉 | |||
| 岩粉在井下，为了防止煤尘爆炸使用的非可燃性物料〈岩石、黏土等〉的粉末。也叫防爆岩粉。参见 rock dust | |||
| 石质粉尘; 石屑; 石粉 | |||
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stone dust : 4 phrases in 1 subject |
| Technology | 4 |
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