we developed new product of wood band saw blade,with the material of 65Mn, specification from 0. ... various hardware tools. At the same time, we produce all kind of steel spring,which can be used in ... all kinds of appliance:starter,balancer,clock,seat belt, ... From 2008, we developed new product of wood band saw blade,with the material of 65Mn, specification from 0.3-1 ...