The unit smooth running rate,which is the measure to evaluate the unit running status,is the important con- tent of technics management of the petrochemical enterprise.

This paper introduces the functions of the pressure stabilizer in the pre-acting design of the automatic sprinkler system, and expounds some experiences of maintaining the systemic pressure by selecting the pressure stabilizer.

Taking a mine auxiliary shaft for example,briefly analyses the reason of winding cage which lost running stability and puts forward the measurement of installing maintaining stability means on cage,and from the strength of winder and crop,makes the allowance weight of maintaining stability means.

A description was made on principle build-up and control characteristics of arc stabilizing device used by DC electric arc furnace.

The super-caliber stabilized assembly of fin-stabilized projectile do use the stable device of can open the tail wing of super-caliber stabilized assembly ,then can make the projectile stable fly .

The results have shown that the muzzle blast can unfold the fins of the projectile in the intermediate period,which can greatly simplify the process of the structure and the manufacture for the stable device of the projectile.