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发明名称
RULER
摘要
申请公布号
GB1590094(A)
申请公布日期
1981.05.28
申请号
GB19770045010
申请日期
1978.05.16
申请人
ALLAN R C
发明人
分类号
B43L7/00;G01B3/04;(IPC1-7):G01B3/04
主分类号
B43L7/00
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