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发明名称
Perfectionnements aux appareils de manoeuvre et d'enclenchement mécaniques des aiguilles et signaux de chemins de fer
摘要
申请公布号
FR713904(A)
申请公布日期
1931.11.04
申请号
FRD713904
申请日期
1931.03.26
申请人
JOHN SAXBY LTD
发明人
分类号
B61L7/02
主分类号
B61L7/02
代理机构
代理人
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