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发明名称
Automatic track switch
摘要
申请公布号
US1770868(A)
申请公布日期
1930.07.15
申请号
US19290392397
申请日期
1929.09.13
申请人
GEORGE TEZARAVICS
发明人
TEZARAVICS GEORGE
分类号
B61L11/02
主分类号
B61L11/02
代理机构
代理人
主权项
地址
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