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经营范围
发明名称
MINING MACHINES
摘要
申请公布号
GB8428353(D0)
申请公布日期
1984.12.19
申请号
GB19840028353
申请日期
1984.11.09
申请人
COAL INDUSTRY (PATENTS) LTD
发明人
分类号
E21C35/23
主分类号
E21C35/23
代理机构
代理人
主权项
地址
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