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发明名称
Rutschbuehnen fuer den Abbau steil gelagerter Kohlenfloeze
摘要
申请公布号
DE527542(C)
申请公布日期
1931.06.18
申请号
DE1929R079400D
申请日期
1929.10.04
申请人
JOSEF ROMBERG
发明人
分类号
E21F13/06
主分类号
E21F13/06
代理机构
代理人
主权项
地址
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