Q181
Open questionDustyness of a place may be considered at dust content less than . . . . . . . . the air is not dusty as per Russian text book.
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Mining Engineering · all questionsMiscellaneous in Mining
Miscellaneous in Mining
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Q182
Open questionThe flame safety lamp is safe as long as it is not allowed to get unduly . . . . . . . .
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Q183
Open questionIf the mines are said to be extremly dusty, if the dust content.
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Q184
Open questionThe interval of bore holes should not be more than . . . . . . . . while working near water lodged workings.
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