All classes of springs for air hose reels, cleaners, timers, meters and toys, spiral springs for safety belts, home appliances, whirl springs and constant force springs with the raw material of domestic 1cr17ni7, imported sus301 stainless steel and thickness ranges from 0.10 to 1.50, stainless steel carbon and steel dome, contact and non-contact elastic components , stainless steel band and carbon quenching band.
