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Roads driven parallel to strike in horizon mining tailed
ABCDA is a closed traverse and the bearings of lines are . . . . . . . . AB = 124° 30', BC = 68° 15', CD = 310° 30', DA = 200° 15'. The sum of the interial angles is . . . . . . . .
If the mine car type is Gable bottom, the mode of unloading provided is . . . . . . . .
The deposits must not exceed 5 - 6 m thickness, though 3m is considered to be economic limit in . . . . . . . . stoping.
Quartz mineral belong to