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发明名称
ROUTE-SWITCHING SYSTEM FOR RAILROAD CLASSIFICATION YARD
摘要
申请公布号
US3598990(A)
申请公布日期
1971.08.10
申请号
USD3598990
申请日期
1969.07.10
申请人
ABEX CORP.
发明人
ROBERT W. CONVEY
分类号
B61L17/00
主分类号
B61L17/00
代理机构
代理人
主权项
地址
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