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发明名称
Variable speed transmission
摘要
申请公布号
US2206859(A)
申请公布日期
1940.07.02
申请号
US19380218853
申请日期
1938.07.12
申请人
DUFFIELD WILLIAM A
发明人
DUFFIELD WILLIAM A.
分类号
F16D67/00
主分类号
F16D67/00
代理机构
代理人
主权项
地址
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