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发明名称
BORERIGG.
摘要
申请公布号
NO904872(D0)
申请公布日期
1990.11.09
申请号
NO19900004872
申请日期
1990.11.09
申请人
NOMELAND, TARALD
发明人
NOMELAND, TARALD
分类号
E21B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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