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经营范围
发明名称
Dipper tooth
摘要
申请公布号
US1799929(A)
申请公布日期
1931.04.07
申请号
US19290369720
申请日期
1929.06.10
申请人
RAUCH JOHN D
发明人
RAUCH JOHN D.
分类号
E02F9/28
主分类号
E02F9/28
代理机构
代理人
主权项
地址
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