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发明名称
WEDGE-TYPE MINING SPRAG
摘要
申请公布号
PL284709(A1)
申请公布日期
1991.10.21
申请号
PL19900284709
申请日期
1990.04.10
申请人
IWANOWICZ ROMAN;POLUS MARIAN;CHMELLA WERNER;MATUSZYK BENEDYKT
发明人
IWANOWICZ ROMAN;POLUS MARIAN;CHMELLA WERNER;MATUSZYK BENEDYKT
分类号
E21D11/14;(IPC1-7):E21D11/14
主分类号
E21D11/14
代理机构
代理人
主权项
地址
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