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经营范围
发明名称
Rock drill
摘要
申请公布号
US2001127(A)
申请公布日期
1935.05.14
申请号
US19340724293
申请日期
1934.05.07
申请人
THE CLEVELAND ROCK DRILL COMPANY
发明人
CURTIS JOHN C.
分类号
B25D9/20
主分类号
B25D9/20
代理机构
代理人
主权项
地址
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