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发明名称
Variable-speed drive
摘要
申请公布号
US2581683(A)
申请公布日期
1952.01.08
申请号
US19490131950
申请日期
1949.12.09
申请人
JAMES MCEWAN
发明人
MCEWAN JAMES
分类号
F16H9/14
主分类号
F16H9/14
代理机构
代理人
主权项
地址
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