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发明名称
Rock drill
摘要
申请公布号
US1846819(A)
申请公布日期
1932.02.23
申请号
US19280324726
申请日期
1928.12.08
申请人
INGERSOLL-RAND COMPANY
发明人
SR. WILLIAM A. SMITH,
分类号
B25D17/26
主分类号
B25D17/26
代理机构
代理人
主权项
地址
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