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发明名称
Expansion bolt
摘要
申请公布号
US2647431(A)
申请公布日期
1953.08.04
申请号
US19500144258
申请日期
1950.02.15
申请人
THE OHIO BRASS COMPANY
发明人
LEWIS WARREN J.
分类号
E21D21/00;F16B13/06
主分类号
E21D21/00
代理机构
代理人
主权项
地址
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