Variable rate springs function correctly with a wider range of loads than fixed rate springs can. Rate increases as spring is compressed; gives greater protection against frame battering, more consistent lockup and improved feeding, while allowing easier
201 stainless steel pipe: the raw material is the steel belt of the refining furnace. The produced stainless steel tube is superior to the stainless steel tube of the intermediate frequency furnace steel strip.
Most of the sliding doors are electric sliding doors, with multi-functional features, and their door bodies have strict requirements against wind load, suitable for installation on various factory building structures.