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发明名称
Vorrichtung zur Foerderung einer unter Tag liegenden niedrigen Bodenschicht
摘要
申请公布号
DE508514(C)
申请公布日期
1931.01.19
申请号
DE1927L068137D
申请日期
1927.03.09
申请人
MARIA RATHJENS GEB. JACOBJ
发明人
分类号
A01B13/10;B01D45/08
主分类号
A01B13/10
代理机构
代理人
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地址
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