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经营范围
发明名称
Continuous mining apparatus
摘要
申请公布号
GB664521(A)
申请公布日期
1952.01.09
申请号
GB19490006534
申请日期
1949.03.10
申请人
JOY MANUFACTURING COMPANY
发明人
分类号
E21C27/26
主分类号
E21C27/26
代理机构
代理人
主权项
地址
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