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发明名称
Fond intermédiaire étanche à l'eau pour une colonne tubulaire destinée à être plongée dans un puits
摘要
申请公布号
FR1412806(A)
申请公布日期
1965.10.01
申请号
FR19640992971
申请日期
1964.10.28
申请人
RHEINISCHE BRAUNKOHLENWERKE A. G.;ETERNIT AKTIENGESELLSCHAFT
发明人
分类号
E03B3/08
主分类号
E03B3/08
代理机构
代理人
主权项
地址
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