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This question belongs to Mining Engineering Coal Mining

Coal Mining

?

Shaft sides buttons are fixed at intervals of . . . . . . . . for support of cables, delivery pipes, etc.

A) 6 - 9 m B) 9 - 16 m C) 16 - 30 m D) 30 - 40 m

Answer & Solution

Correct Answer: Option B

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Question posted by Examveda

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