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发明名称
Improvements relating to speed control systems for gravity operated railway marshalling yards
摘要
申请公布号
GB756499(A)
申请公布日期
1956.09.05
申请号
GB19540012973
申请日期
1954.05.04
申请人
METROPOLITAN-VICKERS-GRS LIMITED
发明人
KUBALE JOHN CHARLES
分类号
B61K7/12
主分类号
B61K7/12
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代理人
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