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发明名称
Drehbarer Spuelrohranschluss fuer Erdbohrmaschinen
摘要
申请公布号
DE600398(C)
申请公布日期
1934.07.21
申请号
DED600398D
申请日期
1930.08.31
申请人
THE NATIONAL SUPPLY COMPANY
发明人
分类号
E21B21/02
主分类号
E21B21/02
代理机构
代理人
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地址
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