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发明名称
Solution facilitating reading the time in any place on the earth by adjusting the selected equatorial point to any time, suitable for use especially as a school instrument
摘要
申请公布号
PL392978(A1)
申请公布日期
2012.05.21
申请号
PL20100392978
申请日期
2010.11.15
申请人
ERD ARKADIUSZ
发明人
ERD ARKADIUSZ
分类号
G09B29/14;G04B19/22;G06G1/08
主分类号
G09B29/14
代理机构
代理人
主权项
地址
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