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发明名称
GRADE CROSSING GATES
摘要
申请公布号
CA518855(A)
申请公布日期
1955.11.22
申请号
CAD518855
申请日期
申请人
WESTERN RAILROAD SUPPLY COMPANY
发明人
SAMUEL MISKELLY
分类号
主分类号
代理机构
代理人
主权项
地址
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