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发明名称
Train control
摘要
申请公布号
US1814612(A)
申请公布日期
1931.07.14
申请号
US19280303134
申请日期
1928.08.31
申请人
ELECTRIC SERVICE SUPPLIES COMPANY
发明人
WILLIAMS CHARLES S.
分类号
B61L3/22
主分类号
B61L3/22
代理机构
代理人
主权项
地址
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