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发明名称
Train control
摘要
申请公布号
US1886062(A)
申请公布日期
1932.11.01
申请号
US19280284801
申请日期
1928.06.12
申请人
JULIAN SPRAGUE FRANK
发明人
SPRAGUE FRANK JULIAN
分类号
B61L3/12
主分类号
B61L3/12
代理机构
代理人
主权项
地址
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