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经营范围
发明名称
Mine roof supports
摘要
申请公布号
GB963199(A)
申请公布日期
1964.07.08
申请号
GB19590036014
申请日期
1959.10.23
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
GRUNWALD HEINRICH HERMANN
分类号
E21D23/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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