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发明名称
EARTH BORING MACHINE AND METHOD
摘要
申请公布号
CA811024(A)
申请公布日期
1969.04.22
申请号
CAD811024
申请日期
申请人
DRAVO CORPORATION
发明人
KENNETH C. COX
分类号
主分类号
代理机构
代理人
主权项
地址
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