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Methods of preloading a sonic drill head
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Year of Publication 06.02.2012
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METHODS OF PRELOADING A SONIC DRILL HEAD AND METHODS OF DRILLING USING THE SAME
NEVENNER TODD A, DRIVDAHL KRISTIAN S, ABLE ROBERT EUGENE, ALTRICHTER KENNETH CARL
Year of Publication 20.10.2011
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Year of Publication 20.10.2011
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