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发明名称
Improvements in or relating to props
摘要
申请公布号
GB697926(A)
申请公布日期
1953.09.30
申请号
GB19510010854
申请日期
1951.05.09
申请人
THEODOR BREIING;WILHEM HEISNER
发明人
分类号
E21D15/43
主分类号
E21D15/43
代理机构
代理人
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