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发明名称
METHOD OF MINING SULFUR DEPOSITS
摘要
申请公布号
PL135468(B1)
申请公布日期
1985.10.31
申请号
PL19820235041
申请日期
1982.02.12
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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