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发明名称
Improvements in or relating to change-speed gearing
摘要
申请公布号
GB502703(A)
申请公布日期
1939.03.23
申请号
GB19370029600
申请日期
1937.10.29
申请人
POL RAVIGNEAUX
发明人
分类号
F16H3/66
主分类号
F16H3/66
代理机构
代理人
主权项
地址
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