Firstly analysis was made on the problems and reasons which were easily taken place when the bottling machine was operated at low temperature, and on this basis, constant temperature heating solution was raised.

When reaching the set temperature,the pressure cooker is in the state of intermittent or constant temperature heating so as to guarantee of safety of the pressure cooker and save electricity.

Based on the idea that the air-conditioner should set and control the radiating rate of the skin directly in a comfortable temperature,the constant-temperature heating wires,which is adjust to animal heat,controlled by heating wires constant-temperature circuits is introduced as intelligent sensor for air-conditioner,instead of traditional temperature sensor adopted by air-conditioner.

This paper explains the thermodynamic concepts of "reversible cycle and irreversible cycle" , "isothermal heat resource" and "heat resource of changeable temperature" .

Effects of La on isothermal oxidation behavior of a Ni-Cr-W-Mo heat-resistant alloy at 1173 K

Oxidation behaviors of zirconium hydride in pure oxygen at 350～600 ℃ were investigated by isothermal oxidation and the influences of temperature and oxidation time on mass increment of the oxide layer were studied.

The oxidation of high speed steel was studied at 500 ℃, 650 ℃ and 800 ℃ in the air, and the isothermal oxidation kinetics curves were obtained by thermo gravimetric analysis.