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发明名称
Verrohrungskopf fuer zwei parallel nebeneinander angeordnete Steigrohrstraenge
摘要
申请公布号
DE1077166(B)
申请公布日期
1960.03.10
申请号
DE1956B041833
申请日期
1956.09.20
申请人
MCEVOY COMPANY
发明人
RHODES ALLEN FRANKLIN
分类号
E21B33/047;G01M3/28
主分类号
E21B33/047
代理机构
代理人
主权项
地址
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