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发明名称
Apparatus for the control of highway crossing signals
摘要
申请公布号
US2030532(A)
申请公布日期
1936.02.11
申请号
US19350017974
申请日期
1935.04.24
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
PARKINSON JAMES A.
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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