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经营范围
发明名称
METHOD OF WET MINING
摘要
申请公布号
JPS55148892(A)
申请公布日期
1980.11.19
申请号
JP19790055382
申请日期
1979.05.07
申请人
DOWA MINING CO
发明人
NISHIDA YONEJI
分类号
E21C41/22;E21B43/28;E21C41/00
主分类号
E21C41/22
代理机构
代理人
主权项
地址
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