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发明名称
METHOD OF FORMATION OF FIRE-EXPLOSION SAFE MEDIUM AT COAL EXTRACTION
摘要
申请公布号
UA72350(C2)
申请公布日期
2005.02.15
申请号
UA20030076149
申请日期
2003.09.02
申请人
发明人
分类号
E21F1/00;E21F5/00;(IPC1-7):E21F5/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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