Tech-Long is Selected as One of the 2015 Top 20 Enterprises in Patent Development of Guangzhou Devel Gallery Tech-Long is Selected as One of the 2015 Top 20 Enterprises in Patent Development of Guangzhou Devel Company News Tech-Long is Selected as One of the 2015 Top 20 Enterprises in Patent Development of Guangzhou Devel ehaitech2020-06-18T08:44:42+08:00 Tech-Long is Selected as One of the 2015 Top 20 Enterprises in Patent Development of Guangzhou Develehaitech2020-06-18T08:44:42+08:00