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发明名称
EARTH BORING APPARATUS
摘要
申请公布号
CA669937(A)
申请公布日期
1963.09.03
申请号
CAD669937
申请日期
申请人
HOLAN CORPORATION
发明人
HERMAN J. TROCHE
分类号
主分类号
代理机构
代理人
主权项
地址
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