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经营范围
发明名称
Drilling machine
摘要
申请公布号
US2087785(A)
申请公布日期
1937.07.20
申请号
US19360109238
申请日期
1936.11.05
申请人
VICTOR SJOLSETH
发明人
SJOLSETH VICTOR
分类号
E21B1/02
主分类号
E21B1/02
代理机构
代理人
主权项
地址
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