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经营范围
发明名称
ROZPORA GORNICZA MINING SPRAG
摘要
申请公布号
PL108043(B1)
申请公布日期
1980.03.31
申请号
PL19750183972
申请日期
1975.10.13
申请人
发明人
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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