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发明名称
Bohrhammerstuetze
摘要
申请公布号
DE748879(C)
申请公布日期
1944.11.10
申请号
DE1941M150616D
申请日期
1941.04.20
申请人
发明人
分类号
E21B19/08;E21B19/086
主分类号
E21B19/08
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代理人
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