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发明名称
Perfectionnements apportés aux éléments de soutènement constitués par des pro filés en forme de rigole profonde avec rebords latéraux
摘要
申请公布号
FR1257442(A)
申请公布日期
1961.03.31
申请号
FR19600827696
申请日期
1960.05.19
申请人
BOCHUMER EISENHUETTE HEINTZMANN & CO
发明人
分类号
E21D11/20
主分类号
E21D11/20
代理机构
代理人
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地址
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