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3 Cards in this Set
- Front
- Back
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A mixture of coal dust in air reduces explosive limit our methane |
A mixture of coal dust in air reduces the explosive limit of methane |
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One and one half to two percent methane together with coal dust in air may be explosive |
One and one half to two percent methane together in air with coal dust my be explosive |
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Mine below the water table tend to have more methane then those above water table |
Mines below water table tend to have more methane then those above the water table |
