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发明名称
Porauslaite
摘要
申请公布号
FI90904(B)
申请公布日期
1993.12.31
申请号
FI19890005412
申请日期
1989.11.14
申请人
RUDOLF HAUSHERR & SOEHNE GMBH & CO KG
发明人
HAUSHERR, HEINRICH-RUDOLF;ECKEY, FRIEDHELM
分类号
E21B1/00;E21B1/26;E21B3/025;E21B4/20;E21B7/02;E21B17/10;(IPC1-7):E21C1/06;E21B17/18
主分类号
E21B1/00
代理机构
代理人
主权项
地址
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