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发明名称
Improvements in or relating to pit props
摘要
申请公布号
GB734554(A)
申请公布日期
1955.08.03
申请号
GB19530019247
申请日期
1953.07.10
申请人
EISENWERK WANHEIM G.M.B.H.
发明人
分类号
E21D15/28
主分类号
E21D15/28
代理机构
代理人
主权项
地址
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