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发明名称
Drawing aid
摘要
申请公布号
GB980580(A)
申请公布日期
1965.01.13
申请号
GB19630028831
申请日期
1963.07.20
申请人
LESLIE REGINALD BLAKE
发明人
分类号
B43L13/24
主分类号
B43L13/24
代理机构
代理人
主权项
地址
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