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发明名称
DRILL BIT
摘要
申请公布号
CA526331(A)
申请公布日期
1956.06.12
申请号
CAD526331
申请日期
申请人
REED ROLLER BIT COMPANY
发明人
ELVIN G. BOICE
分类号
主分类号
代理机构
代理人
主权项
地址
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