goldern23 — Wed, 15 Oct 2008 11:29:49 +0000

P=UI �� =��ѹ �� ѹ��λ��أ�V��λ��ࣨA�� P=VA=W��أ�

�ټ�� — Wed, 15 Oct 2008 11:09:55 +0000

VA��ڹ��ʣ�W��ʵ�ʹ��~�� W

yangyajiang — Wed, 15 Oct 2008 00:13:48 +0000

150VA��Ķ��˼,��˼��ڸ��ش��,��õ�150VAҪ��Ĺ��0.8ʱ, ��ֻ��õ�120VA.��㻹��Ļ�, �ٻ��

��·��������ѡ���VA��W������

��·��ѡ��VA��W��