天堂√8在线中文,亚洲色图AV伦理,美女黑丝自慰一区二区,PORNY九色最新秘密入口

It is a kind of transformer using ferrite as the main material, it can be combined with an external capacitor and emerge resonance, to make the output power voltage stability. It is used as a transformer for all UPS at early stage, but because of the volume is large and heavy, and the regulator is not high, it gradually be eliminated today.