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发明名称
METHOD OF EXPOITING SULPHUR DEPOSITS WITH PERMEABLE OVERLAY USING THE UNDERGROUND MELTING METHODVLI KHIMICHESKIM METODOM PODZEMNOJJ VYPLAVKI
摘要
申请公布号
PL120583(B2)
申请公布日期
1982.03.31
申请号
PL19790216988
申请日期
1979.07.09
申请人
发明人
分类号
E21B;E21B43/28;(IPC1-7):E21B43/28
主分类号
E21B
代理机构
代理人
主权项
地址
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