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发明名称
INSTRUMENT FOR DESCRIBING AND ELLIPSE
摘要
申请公布号
GB9123668(D0)
申请公布日期
1992.01.02
申请号
GB19910023668
申请日期
1991.11.07
申请人
HICKLING, JAMES E
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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