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发明名称
Improvements in or relating to friction devices and method of making same
摘要
申请公布号
GB566572(A)
申请公布日期
1945.01.04
申请号
GB19430002845
申请日期
1943.02.20
申请人
S. K. WELLMAN COMPANY
发明人
分类号
F16D13/64
主分类号
F16D13/64
代理机构
代理人
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