Lub hwj chim system txhais
Cov Fais Fab Hluav Taws Xob yog tag nrho cov khoom siv kho cov khoom siv, DC cov khoom siv fais fab xa tawm, cov ntim roj teeb, DC hloov khoom, cov khoom siv fais fab khib, thiab cov kab hluav taws xob cuam tshuam. Lub kaw lus tswj hluav taws xob muab ntau yam siab thiab tsawg zaus AC thiab DC cov khoom siv fais fab rau ntau lub zog kom tswj kev ua haujlwm ntawm lub cev muaj zog.