Ur = 2.0Vhttps://bgk-photo.cdn.bcebos.com/1f178a82b9014a90345441ddb9773912b31bee6c.jpgUR = 4.0VU = ε − Ur − UR − U灯 = 18VP机 = IU
Ur = 2.0Vhttps://bgk-photo.cdn.bcebos.com/1f178a82b9014a90345441ddb9773912b31bee6c.jpgUR = 4.0VU = ε − Ur − UR − U灯 = 18VP机 = IU
发布时间：2025-09-14 00:45:19
