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发明名称
Boring machine
摘要
申请公布号
US2201733(A)
申请公布日期
1940.05.21
申请号
US19360064306
申请日期
1936.02.17
申请人
KOLLMANN KARL J
发明人
KOLLMANN KARL J.
分类号
B08B9/04;E21B7/04
主分类号
B08B9/04
代理机构
代理人
主权项
地址
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