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发明名称
A technical drawing aid
摘要
申请公布号
GB9604010(D0)
申请公布日期
1996.04.24
申请号
GB19960004010
申请日期
1996.02.26
申请人
SHILLINGFORD, DAVID E
发明人
分类号
B43L7/027;B43L9/00
主分类号
B43L7/027
代理机构
代理人
主权项
地址
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