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发明名称
PARALLEL RULERS
摘要
申请公布号
GB2160478(A)
申请公布日期
1985.12.24
申请号
GB19840015760
申请日期
1984.06.20
申请人
FORBES SUTHERLAND * CAMPBELL
发明人
FORBES SUTHERLAND * CAMPBELL
分类号
B43L7/12;G01C21/20;(IPC1-7):B43L7/00
主分类号
B43L7/12
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代理人
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