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有两批6203器件，产品标识分别为（31 3DEC）和2DEC，两个字符和一个字符分别代表什么意思？器件版本和批次有什么关联吗？怎么能识别出器件的版本？
请问两个芯片的表面打印是什么？一般从表面打印上可以看出硅版本号。
