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发明名称
Wheel
摘要
申请公布号
US2069952(A)
申请公布日期
1937.02.09
申请号
US19310544497
申请日期
1931.06.15
申请人
HOFFMAN ROSCOE C
发明人
HOFFMAN ROSCOE C.
分类号
B60B3/18
主分类号
B60B3/18
代理机构
代理人
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