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发明名称
Improvements in or relating to speed changing mechanism
摘要
申请公布号
GB889437(A)
申请公布日期
1962.02.14
申请号
GB19570014021
申请日期
1957.05.02
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
RAE ALEXANDER JAMES
分类号
主分类号
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