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发明名称
Einrichtung zur Foerderung von Ansaugmedium, insbesondere bei Saugspuelbohrgeraeten
摘要
申请公布号
DE1216816(B)
申请公布日期
1966.05.18
申请号
DE1965V028221
申请日期
1965.04.08
申请人
VEB BRAUNKOHLENBOHRUNGEN;SCHACHTBAU WELZOW
发明人
RENN WERNER
分类号
E21B21/00
主分类号
E21B21/00
代理机构
代理人
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