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经营范围
发明名称
Improvements in or relating to signalling systems
摘要
申请公布号
GB936592(A)
申请公布日期
1963.09.11
申请号
GB19590035524
申请日期
1959.10.20
申请人
GENERAL PRECISION, INC.
发明人
分类号
B61L25/04
主分类号
B61L25/04
代理机构
代理人
主权项
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