Browse TRAIL Inventories

Progress report on investigation of detachable rock-drill bits

Progress report no. 2 on investigation of detachable rock-drill bits

Progress report 4 on investigation of detachable rock-drill bits

Progress report no. 3 on investigation of detachable rock-drill bits

Inspection and maintenance of mine hoisting ropes

Bit gage v. drilling speed

Mount Weather testing adit :progress report 1


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