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经营范围
发明名称
Tool mountings
摘要
申请公布号
US2897899(A)
申请公布日期
1959.08.04
申请号
US19570668212
申请日期
1957.06.26
申请人
HALL SR JESSE E
发明人
SR. JESSE E. HALL,
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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