Dongguan City Yisen Precision Spring Co., Ltd. (Since 1998) is a high technology hardware company with more than 600 workers, and has been specializing in designing and manufacturing springs, hardware and spring making machines. The total sales revenue of overseas market in 2011 will be at least USD 30 million. Under our team's hard work, our company has successfully gained splendid achievements in a few years. We have cooperated with many universities in China, such as Peking University and THU (Tsinghua University). We've also gained worldwide customers' trust with our high...