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发明名称
Profilés jumelés, en forme de gouttière, destinés, notamment, au soutènement des galeries
摘要
申请公布号
FR1113709(A)
申请公布日期
1956.04.03
申请号
FRD1113709
申请日期
1954.11.24
申请人
发明人
GROETSCHEL KARL MARIA
分类号
E21D11/20
主分类号
E21D11/20
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代理人
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