Download 2021 Зѕ¤ж˜џ Дё­ењ‹е¤ўд№‹иѓів·ж€‘向的歜第三孼 З¬¬12жњџ Zip File

If you are looking for a specific write-up, the most documented problems from that year include:

: Sites like EEWorld and Elecfans provide "award-winning project collections" (获奖作品汇编) that often match your "12 zip" description. Key Problem Sets Included in 2021 If you are looking for a specific write-up,

: Fire Extinguishing Unmanned Aerial Vehicle (智能送药小车 / 植保无人机). If you are looking for a specific write-up,

: Signal Distortion Measurement Device (信号失真度测量装置). If you are looking for a specific write-up,

: Periodic Signal Waveform Recognition and Parameter Measurement (周期信号波形识别及参数测量装置).

You can download the 2021 competition materials and technical write-ups from several technical repositories and official archives: