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发明名称
Apparatus for the control of highway crossing signals
摘要
申请公布号
US2237390(A)
申请公布日期
1941.04.08
申请号
US19390266547
申请日期
1939.04.07
申请人
WESTERN RAILROAD SUPPLY COMPANY
发明人
MISKELLY SAMUEL
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
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地址
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