型号 / 厂家，封装，批号，备注，订购

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DM74S181N / nbsp,DIP,0506+,正品!010-62104891 订购 PDF文档

DM74LS670MX / ,,05+,上海实货库存!欢迎查询! 订购 PDF文档

DM74S182N / MURATA,,,原装现货 订购 PDF文档