Peb yuav tsum tau them sai sai rau cov teeb meem tshwm sim los ntawm qhov kub siab thaum siv lub tsheb hluav taws xob
Thaum tsawg {{- voltage rail {{law {} kev tsim khoom lag luam, lossis cov xim tshwj xeeb yuav tsum tau them los xyuas kom muaj kev nyab xeeb thiab txhim khu kev qha. Kev ntsuas kub siab tuaj yeem ua rau muaj kev sib tw rau cov khoom siv, tivtively durability, thiab cov neeg teb xov tooj kev nyab xeeb. Ntawm no yog cov teeb meem tseem ceeb uas yuav tsum ua tib zoo xav txog:
Cuam tshuam rau cov khoom siv hluav taws xob
LAV THIAB TRAWAS KHIB
Cov Txheej Txheem Kev Ncaj Ncees
Tus Neeg Teb Xov Tooj Kev Nyab Xeeb Kev Ntsuas
Roj teeb ua tau zoo (yog muaj)
Hloov kho cov sijhawm
Kev Npaj Kho Mob
