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.

Some methods to prolong the lifetime of catalyst were suggested,i.

The research focuses on the lifetime of well pump unit in oilfields according to the reliability principle.

Aimed at the problems that refractory material in grate-rotary kiln and pellet cooler were marred,the reasons causing the refractory mar were analyzeds and the methods and measures to lengthen the lifetime of refractory material in grate-rotary kiln was proposed.

The circuit can control the memory drum electromotor accurately and prolong the using life of the video tape recorder.

But at present, the using life of conical twin-screw for manufacturing composite is short.