Nanjing Duotai Electronic Technology Co., Ltd. was founded in 2001, specialized in researching, devel-oping, manufacturing and selling kinds of top quality electronic locks, mechanical locks, safe and the series products. In favorable geographic circumstances, our company is located in the beautiful ancient capital of six dynasties- Nanjing. To expand the company business and manage it in standardization, we successfully reformed the en-terprise in 2011, by establishing a new factory, Nanjing ...