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发明名称
Frog and point switch for miniature railway tracks
摘要
申请公布号
US2171357(A)
申请公布日期
1939.08.29
申请号
US19380208625
申请日期
1938.05.18
申请人
HAYWARD H. GATCH
发明人
FREIHOFF ANTHONY G.
分类号
A63H19/32
主分类号
A63H19/32
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代理人
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地址
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