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1、边缘焊盘加长，更适合产测 2、202D封装焊盘加长，且不要存在宽度不等的焊盘 3、原点位置已向左、下移动0.5MM，优化整体布局 4、去掉WiFi，SSW101B性能确实很一般 5、202发热很大，添加散热焊盘