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发明名称
Feeding device for rock drills
摘要
申请公布号
US1844873(A)
申请公布日期
1932.02.09
申请号
US19290330260
申请日期
1929.01.04
申请人
INGERSOLL-RAND COMPANY
发明人
SR. WILLIAM A. SMITH,
分类号
E21B19/084
主分类号
E21B19/084
代理机构
代理人
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地址
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