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发明名称
Improvements in or relating to route indicating devices
摘要
申请公布号
GB492692(A)
申请公布日期
1938.09.26
申请号
GB19370008852
申请日期
1937.03.25
申请人
HAROLD SIMPSON WEST
发明人
分类号
G01C22/00
主分类号
G01C22/00
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代理人
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