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发明名称
METHOD OF CHECKING WRITING INSTRUMENTS
摘要
申请公布号
PL137147(B1)
申请公布日期
1986.05.31
申请号
PL19810233322
申请日期
1981.10.06
申请人
发明人
分类号
B43K15/00;G01D15/24;(IPC1-7):G01D18/00
主分类号
B43K15/00
代理机构
代理人
主权项
地址
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