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发明名称
System for air cooldown in the underground excavations
摘要
申请公布号
PL375904(A1)
申请公布日期
2006.12.27
申请号
PL20050375904
申请日期
2005.06.26
申请人
PATENTUS SA
发明人
POLAK STANISLAW
分类号
E21F3/00
主分类号
E21F3/00
代理机构
代理人
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