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发明名称
Expandable assemblies
摘要
申请公布号
US3055463(A)
申请公布日期
1962.09.25
申请号
US19610111400
申请日期
1961.05.19
申请人
RHEINSTAHL WANHEIM G.M.B.H.
发明人
LUTZ HERMANN
分类号
E21D15/43
主分类号
E21D15/43
代理机构
代理人
主权项
地址
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