An analysis of social development and life expectancy in the post-war world;

It is shown that the levels of a damped Λ type atom split into six sublevels and the lifetime change.

Since February 1993,the tuyere working-life has been prolonged by 3 times and the annual economic profit increased about million yuan with fiow-refracted patent tuyere smalljacket applied to substitute the cavity-style and duo-cabin tuyere small-jacket in blast furnace in Xinhengji General Iron-Steel Cement Plant, and the structure of above tuyere small-jacket is analyzed concrerely.

Creep tests of P91 base material and its welds have been carried out,the creep behavior of P91 studied and creep rupture strength extrapolated by the Isothermal and the L-M parameter methods,followed by creep life estimations of P91 fresh steam pipes.

The causes of rigidity change are concluded,and T92 steel s approximate creep life is extrapolated based on rigidity method.

Multi-axial creep testing methods are generalized,and then the method of how to evaluate the creep life of high temperature components based on creep testing data is presented.