Trafo las, trafo cas accu/ battery, trafo crom nickel, stepup / step down, pesawat computer:, monitor computer, konektorcomputer, CPU computer, key board computer, hard disk computer,kabel listrik computer, terminal computer, mesin printer com-puter, pesawat-pesawat otomatis, batu battery, accu, mesin potocopy, vaccum cleaner, pesawat radio,televisi berwarna dan hitamputih, telephon (pesawat telephon), amplifier, antena, booster,balast, fitting listrik