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发明名称
Track guide means for jumbo shaft drills
摘要
申请公布号
US3217837(A)
申请公布日期
1965.11.16
申请号
US19620208158
申请日期
1962.05.28
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
SAMHAMMER DONALD F.;HEPOLA GEORGE E.
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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