JOTING SPRING MACHINE CO., LTD. is a company specializing in computer spring machinery and equipment manufacturers, its parent company, Northeast spring Wu Dong and machinery by the company was founded in 1981 in Taipei, Taiwan. The company first invented universal computer spring in the Asia Pacific region, initially only a single type EN501, and (Patent No. 4,947,670) and China (Patent No. 92240999.4) to obtain patents, then after transfer of technology patents core structure (97,216,099) of the invention in the United States , the achievements of the Asia-Europe EN502S selling models. It laid the company's position in the spring machinery industry. EN502S machinery have been sold so far, with a simple-to-use, high production efficiency, stable and efficient, cost-effective and perfect after-sale, occupied the mainstream market