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发明名称
Screw
摘要
申请公布号
US2289561(A)
申请公布日期
1942.07.14
申请号
US19400364897
申请日期
1940.11.08
申请人
CHAMPION, INC.
发明人
WEST MAXWELL A.
分类号
F16B23/00
主分类号
F16B23/00
代理机构
代理人
主权项
地址
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