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发明名称
Steuervorrichtung für das Druckmittel in Gesteinsbohranlagen
摘要
申请公布号
CH447988(A)
申请公布日期
1967.12.15
申请号
CH19670005088
申请日期
1967.04.11
申请人
SCHWEIZERISCHE INDUSTRIE-GESELLSCHAFT
发明人
ALBRECHT,WALTER;SIEGENTHALER,MAX
分类号
E21B15/04;(IPC1-7):E21C3/02
主分类号
E21B15/04
代理机构
代理人
主权项
地址
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