Double-beam math balance,申请号GB19990018136-传众专利搜索

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发明名称	Double-beam math balance
摘要
申请公布号	GB9918136(D0)	申请公布日期	1999.10.06
申请号	GB19990018136	申请日期	1998.02.11
申请人	STEANE, DOUGLAS A	发明人
分类号	G09B19/02;G09B23/02	主分类号	G09B19/02
代理机构		代理人
主权项
地址

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