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经营范围
发明名称
AUSBLASPREVENTER
摘要
申请公布号
DE2160123(B2)
申请公布日期
1977.05.26
申请号
DE19712160123
申请日期
1971.12.03
申请人
发明人
分类号
E21B33/06;(IPC1-7):E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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