发布时间:2025-02-01 03:01:48
LED灯本身功率因数就是1,要是求为led供电的电源和led总的功率因数,可以根据限流电容和led串联,把led当纯电阻,计算这个阻容串联电路的功率因数就可以
我家楼顶开裂渗水原先曾经用过沥青修补但不理想现在我想彻底地做一次防水处理望高手指点用什么
2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48 2025-02-01 03:01:48