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发明名称
Gesteinstaubschranke
摘要
申请公布号
DE672179(C)
申请公布日期
1939.02.24
申请号
DE1937G096390D
申请日期
1937.10.07
申请人
DR. HEINRICH GIEREN
发明人
GIEREN DR. HEINRICH
分类号
E21F5/14
主分类号
E21F5/14
代理机构
代理人
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地址
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