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经营范围
发明名称
Système de signalisation électrique pour la protection des passages à niveau
摘要
申请公布号
FR764148(A)
申请公布日期
1934.05.15
申请号
FRD764148
申请日期
1933.11.22
申请人
发明人
PENNARUN JEAN
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
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