Tsawg voltage switchear

Tsawg - voltage rho tawm switchable switchernear Ntau
Tsawg heev voltage tsau hloov pauv Ntau

Raws li ib qho ntawm cov thawj coj muaj voltage qhov hloov chaw nyob hauv Suav teb, peb sov siab txais tos voltage hloov chaw nyob hauv, tiv tauj peb tam sim no.