Harmonics are periodic distortions of voltage, latest, or electricity sine waves. Harmonics in electrical power distribution methods are often a result of non-linear masses such as switched method dc power provides and adjustable velocity motor drives. Vậy nên nhà cái 123b chỉ cần có bất kỳ hành động gian lận https://123b61592.blogsmine.com/26311213/blog-no-further-a-mystery