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经营范围
发明名称
Railway joint chair
摘要
申请公布号
US1812786(A)
申请公布日期
1931.06.30
申请号
US19310517034
申请日期
1931.02.19
申请人
DRAGUTIN HERL
发明人
HERL DRAGUTIN
分类号
E01B11/62
主分类号
E01B11/62
代理机构
代理人
主权项
地址
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