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经营范围
发明名称
BOHRLOCHKOPFABDICHTUNG.
摘要
申请公布号
AT51268(T)
申请公布日期
1990.04.15
申请号
AT19840304924T
申请日期
1984.07.19
申请人
BARBER INDUSTRIES LTD.
发明人
JOHNSON, CLARENCE WILLIAM
分类号
E21B33/03;F16J15/10;(IPC1-7):E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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