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发明名称
Speed changing device
摘要
申请公布号
US2047840(A)
申请公布日期
1936.07.14
申请号
US19350007956
申请日期
1935.02.25
申请人
TWOMLEY HERBERT E
发明人
TWOMLEY HERBERT E.
分类号
F16H9/12
主分类号
F16H9/12
代理机构
代理人
主权项
地址
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