He tong fa

Descripción

Ben shu xi tong di jie shao he tong fa de ji ben li lun,Bing fan ying he tong fa yan jiu de zui xin cheng guo.Nei rong bao kuo:he tong yu he tong fa gai shu,He tong de cheng li,He tong de nei rong he xing shi,He tong de xiao li,He tong de lü xing,He tong de bao quan,He tong de bian geng he zhuan rang,He tong de zhong zhi deng.