workers in coal mines use battery operated torch lights instead of lanterns. find out the reason for doing so.
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In the deep coal mines highly inflammable gases are released.In case there is an open source of fire to provide light then these highly inflammable gases may catch fire and the lives of the miners would be in danger or may be lost.
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In the deep coal mines highly inflammable gases are released.In case there is an open source of fire to provide light then these highly inflammable gases may catch fire and the lives of the miners would be in danger or may be lost.
Explanation:
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