The factors which influence life, such as truncation of high loads, omission of low amplitude cycles, load sequence, and different spectrum shapes,are discussed.

Many experiments on low cut filter were carry out to meet the requirement that balance of high frequency energy and low frequency energy is necessity for high resolution seismic exploration.

The paper describes status quo of degreasing in non-ferrous metallurgical water extraction,new process and equipment of degreasing and application of intercept degreasing technology and device on nickel solution degreasing.