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经营范围
发明名称
Coal working apparatus
摘要
申请公布号
GB722105(A)
申请公布日期
1955.01.19
申请号
GB19510021933
申请日期
1951.09.18
申请人
DEMAG AKTIENGESELLSCHAFT
发明人
分类号
E21C27/18
主分类号
E21C27/18
代理机构
代理人
主权项
地址
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