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发明名称
AUGER BIT
摘要
申请公布号
CA325429(A)
申请公布日期
1932.08.30
申请号
CAD325429
申请日期
申请人
JOHN A. ARENZ
发明人
JOHN A. ARENZ
分类号
主分类号
代理机构
代理人
主权项
地址
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