目前较为常用的串口有9针串口（DB9）和25针串口（DB25），通信距离较近时(<12m)，可以用电缆线直接连接标准RS232端口(RS422,RS485...

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Algorithm One possible version of the buddy allocation algorithm was described in detail by Donald Knuth in The Art of Computer Programming. This is a complicated process.-Algorithm One possible version of the buddy allocation algorithm was described in detail by Donald Knuth in The Art of Computer Programming. This is a complicated process.

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