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发明名称
Fangvorrichtung fuer Rohrleitungen, besonders in Bohrloechern zur OElgewinnung, bestehend aus einer Fuehrungshuelse und einem Keilblock
摘要
申请公布号
DE492673(C)
申请公布日期
1930.02.27
申请号
DE1927D053764D
申请日期
1927.08.30
申请人
STEPHEN VINCENT DILLON
发明人
分类号
E21B31/20
主分类号
E21B31/20
代理机构
代理人
主权项
地址
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