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发明名称
Passage à niveau lumineux
摘要
申请公布号
FR819763(A)
申请公布日期
1937.10.26
申请号
FRD819763
申请日期
1937.03.26
申请人
发明人
MESSENIE LEON, CHARLES;RACINE ROGER
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
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