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发明名称
Strahlduesenbohrer fuer harte Mineralschichten
摘要
申请公布号
DE1115203(B)
申请公布日期
1961.10.19
申请号
DE1959U006443
申请日期
1959.08.21
申请人
UNION CARBIDE CORPORATION
发明人
JUN. DAVID HAMILTON FLEMING
分类号
E21B7/14
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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