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发明名称
Système optique pour appareils de transmission des signaux lumineux aux trains de chemin de fer
摘要
申请公布号
FR724727(A)
申请公布日期
1932.05.02
申请号
FRD724727
申请日期
1931.10.17
申请人
SOCIETE CARL ZEISS
发明人
分类号
B61L3/06
主分类号
B61L3/06
代理机构
代理人
主权项
地址
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