Физика разрушения горных пород при бурении и взрывании. Ч. II. Разрушение горных пород при бурении. Раздел 1. Внедрение зубьев в разрушаемую породу. Ударно-вращательный способ бурения : учебное пособие

107 Pages · 2007 · 2.73 MB · Russian
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“ You're not going to master the rest of your life in one day. Just relax. Master the day. Than just keep doing that every day. ” ― Anonymous
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