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发明名称
Grubenausbau mit zwischen den Stossenden der gegeneinanderstehenden Ausbauteile eingelegten Quetschhoelzern
摘要
申请公布号
DE665618(C)
申请公布日期
1938.10.24
申请号
DE1932T040880D
申请日期
1932.06.15
申请人
ALFRED THIEMANN
发明人
分类号
E21D11/24
主分类号
E21D11/24
代理机构
代理人
主权项
地址
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