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发明名称
Nut lock
摘要
申请公布号
US1821652(A)
申请公布日期
1931.09.01
申请号
US19290415211
申请日期
1929.12.19
申请人
MERRILL A. KERCHER
发明人
分类号
F16B39/32
主分类号
F16B39/32
代理机构
代理人
主权项
地址
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