Hickok Electrical Instrument 539C Tube Tester Litaelo
Ithute ka Hickok Electrical Instrument 539C Tube Tester - sesebelisoa se tšepahalang sa ho leka li-vacuum tubes ka nepo. Fumana litlhaloso tsa eona, litaelo tsa ts'ebetso, le lintlha tsa tiisetso bukeng ena e felletseng ea mosebelisi.
