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发明名称
Traction device
摘要
申请公布号
US1915561(A)
申请公布日期
1933.06.27
申请号
US19310560404
申请日期
1931.08.31
申请人
DERVEER RALPH L VAN
发明人
DERVEER RALPH L. VAN
分类号
B60B15/02
主分类号
B60B15/02
代理机构
代理人
主权项
地址
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