Analysis of elements influencing sport life span of athletes in China at present;

An introduction to sport life span of excellent athletes;

Comparing with other strong gymnastic countries,the female gymnastic athletes of our country retire on a young age,with a short sport life span,which seriously influences the sustainable development of the female gymnastics of our nation.

Influences of social changes on top Chinese athletes sport life span;

The difference of sports life between excellent Chinese athletes in different event groups;

The prolonging of sports life of many excellent athletes really helps to realize retrenchment of high investment and high output.

The factors influencing the sports life span of the Chinese female gymnasts were divided into two categories, the sports training theory category and the sociology category.

Development trend of bag filter in coal-fired power plants and influencing factors on the service life;

A probe into tracking scheme for service life of single-phase induction long-life kilowatt-hour meters;

By comparing the field data with the tentative data and using computation software to analyze the pipeline pressure,they intended to discover which factors would influence the service life of the dented pipeline from various aspects.

Analysis on the factors to influence the operating life of gear pump for molten polyester;