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发明名称
DRIVING COLUMN
摘要
申请公布号
PL296663(A1)
申请公布日期
1994.05.30
申请号
PL19920296663
申请日期
1992.11.18
申请人
WSZOLEK STANISLAW
发明人
WSZOLEK STANISLAW
分类号
E21B4/00;(IPC1-7):E21B4/00
主分类号
E21B4/00
代理机构
代理人
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地址
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