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发明名称
Improvements in and relating to recessed screw heads
摘要
申请公布号
GB907279(A)
申请公布日期
1962.10.03
申请号
GB19610003151
申请日期
1961.01.26
申请人
RICHARD GEORGE CHRISTOPHER JENKINS
发明人
分类号
F16B23/00
主分类号
F16B23/00
代理机构
代理人
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