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发明名称
Dispositif d'aération de galeries
摘要
申请公布号
FR1294800(A)
申请公布日期
1962.06.01
申请号
FR19610858933
申请日期
1961.04.17
申请人
发明人
SINGER RAYMOND ALBERT MARCEL
分类号
E21F1/04
主分类号
E21F1/04
代理机构
代理人
主权项
地址
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