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
This retro rivet button for jeans is made of iron alloy. Iron is a dense, malleable,and magnetic metal.Iron is a dense, malleable, malleable and magnetic metal. Because iron is easy to oxidize and rust in humid air,evenly pollutes clothing, so it is often
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.