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发明名称
Speed changing and coupling device
摘要
申请公布号
US1954418(A)
申请公布日期
1934.04.10
申请号
US19320640283
申请日期
1932.10.29
申请人
EMIL LEY
发明人
LEY EMIL
分类号
F16D31/04
主分类号
F16D31/04
代理机构
代理人
主权项
地址
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