A qualitative analysis on energy saving for VPF is made in this paper,points out actual saving depends on control mode and appropriate equipment.
对一次冷冻水变频节能效果定性分析,指出实际的节能效果取决于控制方式,而且对系统控制设备的选取也有一定的要求。
Through the analysis to the concepts of once-through penetration length and the deduction of the formula of the method of inner penetration of circular bead at off-center locationand the Calculation and the comparison between the defferentresults, the anthor makes an approach to the formula 4.
通过对一次透照长度概念的分析以及对环焊缝内透偏心法(F