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经营范围
发明名称
FLEXIBLE SUB
摘要
申请公布号
RU1781404(C)
申请公布日期
1992.12.15
申请号
SU19894760306
申请日期
1989.11.20
申请人
PERMSKIJ VNII BUROVOJ TEKHNIKI
发明人
SHCHELKONOGOV GENNADIJ A,SU
分类号
E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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