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经营范围
发明名称
Mine filling frame structure comprising props and pivotally connected girders
摘要
申请公布号
US2729945(A)
申请公布日期
1956.01.10
申请号
US19500146908
申请日期
1950.02.28
申请人
KARL GERLACH
发明人
GERLACH KARL
分类号
E21D17/086
主分类号
E21D17/086
代理机构
代理人
主权项
地址
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