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Mining Engineering Opencast Mining Difficulty: Medium

The height of coal bench should not exceed.

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A prop which is set that the axis is inbetween the vertical and the normal to the seam called The instrument used quarry face and bore hole surveying is named as . . . . . . . . Bucket wheel excarators employed in these rock conditions. The ratio between load to effort is called . . . . . . . . A second charge shall not be placed in the same hole in case of . . . . . . . .