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发明名称
Improvements in and relating to straight-edge rulers
摘要
申请公布号
GB586890(A)
申请公布日期
1947.04.03
申请号
GB19440022990
申请日期
1944.11.20
申请人
WALTER SHAW;JAMES MCPHERSON SWAN
发明人
分类号
B43L7/00;G01B3/04
主分类号
B43L7/00
代理机构
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