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经营范围
发明名称
COAL EXTRACTION
摘要
申请公布号
GB2053955(A)
申请公布日期
1981.02.11
申请号
GB19790024935
申请日期
1979.07.17
申请人
COAL INDUSTRY (PATENTS)LTD
发明人
分类号
C10G1/00;C10G1/04;C10G1/06;(IPC1-7):C10G1/06
主分类号
C10G1/00
代理机构
代理人
主权项
地址
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