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经营范围
发明名称
WEDGE-TYPE MINING SPRAG
摘要
申请公布号
PL290715(A1)
申请公布日期
1992.12.28
申请号
PL19910290715
申请日期
1991.06.18
申请人
IWANOWICZ ROMAN;CHMELLA WERNER;MATUSZYK BENEDYKT
发明人
IWANOWICZ ROMAN;CHMELLA WERNER;MATUSZYK BENEDYKT
分类号
E21D11/28;(IPC1-7):E21D11/28
主分类号
E21D11/28
代理机构
代理人
主权项
地址
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