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发明名称
RAISE DRILLING METHOD AND MECHANISM
摘要
申请公布号
CA766641(A)
申请公布日期
1967.09.05
申请号
CAD766641
申请日期
申请人
JAMES S. ROBBINS AND ASSOCIATES
发明人
RICHARD J. ROBBINS;DEAN K. MCCURDY;ROBERT E. CANNON;DOUGLAS F. WINBERG
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