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发明名称
Improvements in travelling hydraulically-operated frames for supporting mine galleries and the like
摘要
申请公布号
GB755330(A)
申请公布日期
1956.08.22
申请号
GB19540000702
申请日期
1954.01.11
申请人
DEUTSCHE KOHLENBERGBAULEITUNG
发明人
分类号
E21D15/44;E21D23/00
主分类号
E21D15/44
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代理人
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