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发明名称
Railway switch
摘要
申请公布号
US1787336(A)
申请公布日期
1930.12.30
申请号
US19300464947
申请日期
1930.06.30
申请人
BAGLEY FRANCIS H
发明人
BAGLEY FRANCIS H.
分类号
B61L5/00
主分类号
B61L5/00
代理机构
代理人
主权项
地址
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