? Compression spring (spring) is subjected to the pressure of the coil spring material cross-section it uses mostly circular, rectangular and multi-strand is also useful Ying-rolled steel, spring is generally equal pitch, the compression spring has a shape : cylindrical, conical, the male and the female as well as a small amount of non-circular, etc., there is a gap between the coils of the compression spring, when subjected to external load contraction spring deformation, deformation energy storage. Features compression spring (CompressionSprings) External load pressure to provide resistance forces. Compression spring is usually coiled metal wire pitch and a fixed diameter. Using a plurality of open coil compression spring Foreign load pressure (such as gravity depressed wheels, or physical pressure on a mattress) supply resistance forces. That is, they are pushed back in order to resist external pressure. Compression spring is usually coiled metal wire pitch and a fixed diameter. In addition, there are conical compression springs or conical springs and linear combinations. Depending on the applications, the compression spring can be used to resist the pressure and (or) to store energy. Round wire is the most common compression spring, but there are square, rectangular and special shape wire manufacturing a compression spring.