Muaj ob txoj hauv kev los them cov tsheb hluav taws xob, AC them thiab DC them, ob qho tib si muaj qhov sib txawv loj hauv cov khoom siv xws li tam sim no thiab voltage.Lub qub muaj ib tug tsawg them efficiency, thaum lub tom kawg muaj ib tug ntau dua them efficiency.Liu Yongdong, Tus Lwm Thawj Coj ntawm Koom...
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