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发明名称
SPOSOB WYKONYWANIA SZTUCZNYCH FILAROW,ZWLASZCZA W WYROBISKACH GORNICZYCH
摘要
申请公布号
PL97369(B1)
申请公布日期
1978.02.28
申请号
PL19750184656
申请日期
1975.11.11
申请人
发明人
分类号
E21F15/00;(IPC1-7):E21F15/00
主分类号
E21F15/00
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代理人
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地址
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