理想变压器在现实世界中是不存在的，但我们在一些不用很精确的场合，可以把缠绕很多匝的、耦合紧密的铁芯变压器近似为理想变压器，比如电力系统中的变压器。 新市場 The farther "free, white, and 20-a single" bought from its roots inside the Southern U.S. as an encapsulation of essentially the most-favored-citizenship position under regulation, the considerably less it grew to become about offici... https://sexeslive.com/