... quality control and management5.Applications:cars,machines,electronic products,electric appliance,power switches,miniature switches, ... thorugh TS16949,ISO14001,OHSAS18001XIAMEN HONGSHENG - HARDWARE SPRING CO.,LTD. has been manufacturing Technical Springs since 2004. ... in the manufacture of the products. XIAMEN HONGSHENG - HARDWARE SPRING CO.,LTD. manufactures high precision springs laying emphasis ...