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发明名称
Streifenbruchbau mittels Abbaukammern
摘要
申请公布号
DE973905(C)
申请公布日期
1960.07.14
申请号
DE1950H002016
申请日期
1950.03.15
申请人
HAMEL ALBERT
发明人
HAMEL ALBERT
分类号
E21C41/16
主分类号
E21C41/16
代理机构
代理人
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地址
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