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发明名称
Spring wheel
摘要
申请公布号
US2140431(A)
申请公布日期
1938.12.13
申请号
US19370162732
申请日期
1937.09.07
申请人
MORPHEW DAVID E
发明人
MORPHEW DAVID E.
分类号
B60B9/26
主分类号
B60B9/26
代理机构
代理人
主权项
地址
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