镇流器

electrical ballast

device / tool / utensil / CL:臺|台[tai2]

to flow / to disseminate / to circulate or spread / to move or drift / to degenerate / to banish or send into exile / stream of water or sth resembling one / class, rate or grade

to press down / to calm / to subdue / to suppress / to guard / garrison / small town / to cool or chill (food or drinks)