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Mining Engineering Mine Legislation And General Safety Difficulty: Medium

General lighting arrangement shall be provided during working hours on surface at

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What is the primary support used in weak underground conditions? In which line of extraction the stook is under excessive pressure and liable to crush. Oxygen balanced explosive mixture with . . . . . . . . of desel oil by weight. In survey work, the position of a point is determined with reference to . . . . . . . . In such area prone to airblast what adequate numbers of convergence recorders are installed in the vicinity of pillar extraction?