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发明名称
METHOD OF PROTECTING MINE WORKINGS AGAINST METHANE ACCUMULATION
摘要
申请公布号
PL174702(B1)
申请公布日期
1998.09.30
申请号
PL19950307425
申请日期
1995.02.23
申请人
RYBNICKA SP.WEGLOWA SA KOPALNIA WEGLA KAMIENNEGO "ANNA"
发明人
GASZKA FRANCISZEK;ZAJAC BOGDAN;NOSIADEK ROMAN
分类号
E21F7/00
主分类号
E21F7/00
代理机构
代理人
主权项
地址
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