The results indicated that after machining the stress is re arranged and the residual stress decreases; the effect of thermal cycle stress relief treatment is little.
结果表明：加工以后使应力重新分布和使残余应力降低或均匀化，冷热循环去应力处理效果很小。
2
Sludge water content has been detected as the index to indicate the effect of ultrasonic and composite flocculants on the residual activated sludge in petrochemical water treatment plants.
以污泥含水率为考察指标，研究了超声波-复合絮凝剂对石化厂剩余污泥脱水效果的影响。
3
Through measuring and comparing of the residual stresses be fore and after treatment, it is result in raising the quality and effect of treatment and reducing the environment pollution.