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经营范围
发明名称
Railroad tie protector
摘要
申请公布号
US1837370(A)
申请公布日期
1931.12.22
申请号
US19300487948
申请日期
1930.10.11
申请人
JOHN PUGEL
发明人
PUGEL JOHN
分类号
E01B3/08
主分类号
E01B3/08
代理机构
代理人
主权项
地址
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