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发明名称
摘要
申请公布号
NO115049(B)
申请公布日期
1968.07.15
申请号
NO19640155334
申请日期
1964.10.28
申请人
ATLAS COPCO AB
发明人
QVARNSTROEM K;SKATTMAN C
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
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