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发明名称
Railway gate
摘要
申请公布号
US1911417(A)
申请公布日期
1933.05.30
申请号
US19280244874
申请日期
1928.01.06
申请人
ZENT WAYNE P
发明人
ZENT WAYNE P.
分类号
B61L29/02
主分类号
B61L29/02
代理机构
代理人
主权项
地址
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