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发明名称
Système d'établissement de plages sablonneuses sur les grèves recouvertes de gravier ou de galets
摘要
申请公布号
FR696879(A)
申请公布日期
1931.01.09
申请号
FRD696879
申请日期
1929.09.18
申请人
发明人
NIVERT EMILE
分类号
E02B3/04
主分类号
E02B3/04
代理机构
代理人
主权项
地址
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