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经营范围
发明名称
ETANCON DE MINE, EN FER
摘要
申请公布号
BE490915(A)
申请公布日期
1949.09.15
申请号
BED490915
申请日期
1949.08.31
申请人
LANGERBEIN BERNHARD
发明人
分类号
E21D15/28
主分类号
E21D15/28
代理机构
代理人
主权项
地址
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