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经营范围
发明名称
Kratzerwerk zum Abraeumen der Abraumschicht ueber Braunkohle, Moor u. dgl.
摘要
申请公布号
DE516090(C)
申请公布日期
1931.01.17
申请号
DE1929W083387D
申请日期
1929.08.03
申请人
DR. WILHELM WIELANDT
发明人
分类号
E21C49/00
主分类号
E21C49/00
代理机构
代理人
主权项
地址
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