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发明名称
FOERFARANDE I GRUVAR FOER OEPPNING AV TILLTAECKTA LASTNINGSTRATTAR OCH/ELLER STENSCHAKT OCH SPRAENGSATS FOER ANVAENDNING VID FOERFARANDET
摘要
申请公布号
FI782997(A)
申请公布日期
1980.04.03
申请号
FI19780002997
申请日期
1978.10.02
申请人
RAIKKA OY
发明人
AHOLA TAUNO
分类号
E21C37/00;E21D;(IPC1-7):E21D/
主分类号
E21C37/00
代理机构
代理人
主权项
地址
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