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发明名称
CUTTER POSITION CONTROL
摘要
申请公布号
AU2346477(A)
申请公布日期
1978.09.28
申请号
AU19770023464
申请日期
1977.03.21
申请人
SMITH INTERNATIONAL, INC.
发明人
ROBERT WESLEY WEBER
分类号
E21B10/34
主分类号
E21B10/34
代理机构
代理人
主权项
地址
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