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经营范围
发明名称
Drilling machine
摘要
申请公布号
US2113723(A)
申请公布日期
1938.04.12
申请号
US19340705531
申请日期
1934.01.06
申请人
EVERETT EDWARD A
发明人
EVERETT EDWARD A.
分类号
E01B31/06
主分类号
E01B31/06
代理机构
代理人
主权项
地址
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