Title: Wu liu xin xi ji shu yu xin xi xi tong
Description: Ben shu nei rong bao kuo:xian dai wu liu xin xi ji shu yu xin xi guan li gai shu, Zi dong shi bie ji shu, Di li xin xi xi tong(GIS), Quan qiu ding wei xi tong(GPS), Wu liu xin xi xi tong kai fa yu guan li, Wu liu xin xi xi tong de dian xing gong neng mo kuai deng.
Subjects: Wu liu, Xin xi ji shu ., Wu liu .