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发明名称
METHOD OF CAVITYLESS LONGWALL COAL MINING
摘要
申请公布号
PL295559(A2)
申请公布日期
1993.05.17
申请号
PL19920295559
申请日期
1992.08.04
申请人
RYDULTOWY KOPALNIA WEGLA KAMIE
发明人
BYWALEC ANDRZEJ;WOZNICA CZESLAW;WIDERA ADOLF;CHLUBA GERARD;RYGIEL TADEUSZ
分类号
E21C41/18;(IPC1-7):E21C41/18
主分类号
E21C41/18
代理机构
代理人
主权项
地址
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