The results show that reliable life of CTPB propellant is about 10 years.

Based on the analysis and comparison between the method of one-sided tolerance limit coefficient and the method of two-dimensional one-sided tolerance limit coefficient,a small-sample assessment method for reliable life with normal distribution in accelerated test is proposed.

A practical point estimation for the reliable life of a product without life distribution data is established based on a non parameter statistical method.

Based on the wear law and reliability theory of the thrust bearing,the mathematical model of reliability life calculation on the wear of the thrust bearing is derived.

Based on Weibull distribution, this paper gives a reliability estimation of the fatigue life of the metal material of some key component on the airplane, and gives estimating results of partial reliability degree and reliability life.

Based on typeⅡcensored data,a generalized lower confidence limit is constructed for the reliability life of a two-parameter exponential distribution by using the concept of a generalized confidence interval due to Weerahandi.

Main factors influencing the service life of solid caustic soda pots;

Discuss on how to improve the service life of injection mold;

Experiences of Prolonging Service Life of Profiled Reed of Air-jet Loom;

Study on technology of increasing working life of cold extrusion terne die;

Ways to improve the working life of casting roller;

The effect of surfacing process technology on the working life of a cylinder sleeve;

The life of die and choosing and treatment of die materials;

A large-scale study on the extension of activated carbon′s life;

After improvement of heat treatment of sliding boots bottom in MG300/700-WD coal-winning machine,organization of sliding boots' bottom could be improved,rigid and wear-resisting of sliding boots' bottom could be raised very much,sliding boots have high fatigue limit,life of sliding boots could be raised,productivity could be raised.