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Why gas masks are used by miners in coal mines while working ?
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asked
Jan 13, 2019
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Chemistry
by
kratos
Why gas masks are used by miners in coal mines while working ?
environmental chemistry
cbse
surface chemistry
class-11
world war ii
class-10
class-12
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answered
Apr 19, 2020
by
kratos
Best answer
[Hint : To absorb poisonous gases.]
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