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经营范围
发明名称
Vorrichtung zum Gewinnen und Fangen ungestoerter Bohrkerne
摘要
申请公布号
DE1298473(B)
申请公布日期
1969.07.03
申请号
DE1967V033933
申请日期
1967.06.23
申请人
VEB BRAUNKOHLENBOHRUNGEN UND SCHACHTBAU WELZOW NL
发明人
REINHARD LANG,;GUENTER DUBIAN,
分类号
E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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