This paper briefly introduces the structures and principles of the ternary catalytic reactor used in automobiles, and expounds the working conditions that guarantee the performances of the ternary catalytic reactor and the significance of rationally matching of the reactor with the motor.

However,which arrays are propitious to target exploration? This paper, based on the working rules of High Density Resistivity, discusses its working condition, array selection and data observation, which can guide the practical working of High Density Resistivity.

In view of the matching of pantograph-overhead lines,improving suggestions of the installation positions,working conditions and maintenances of section insulators are put forward.

OBJECTIVE To study the current working conditions of the staff members for infectious disease prevention and control at the grass-roots in Beijing.

Traditional reliability evaluating methods usually put products under typical fixed conditions,and for changeable working conditions,there is no effective way up to now.

Utilizing operation data in normal production the activation factors of catalyst in various stages of catalysis beds were obtained by reckoning;optimization was made one by one for the unit process operation condition,situation of system pressure .