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经营范围
发明名称
GRAPHING AIDS
摘要
申请公布号
GB2139152(B)
申请公布日期
1987.08.26
申请号
GB19830009352
申请日期
1983.04.06
申请人
DAVID WILLIAM * BOWATER
发明人
DAVID WILLIAM * BOWATER
分类号
G06C3/00;G09B29/00;(IPC1-7):B43L13/00
主分类号
G06C3/00
代理机构
代理人
主权项
地址
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