Principles of Mining: Valuation, Organization and Administration

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Chapter 14 No.14

Word Count: 2649 | Released on: 01/12/2017

Equipment (

AIR VS. ELECTRICITY; AIR DRILLS; MACHINE VS. HA

ill-holes for blasting by Caspar Weindel in Hungary, t

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“Principles of Mining: Valuation, Organization and Administration by Herbert Hoover”