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发明名称
Tiefbohrverfahren und Vorrichtung zur Durchführung des Verfahrens.
摘要
申请公布号
CH240172(A)
申请公布日期
1945.12.15
申请号
CHD240172
申请日期
1943.09.22
申请人
SCHNYDER,ROBERT
发明人
SCHNYDER,ROBERT
分类号
E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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