• Telefon for høyspenningsanlegg, Siemens. Fig 6: Topolet bryter. Fig: 7: Grovlynavleder. Fig 8: Sikringssystem. Fig 9: Telefon transformator. Elektrisk Bureau.
    Photo: Telemuseet
    (Copyright)

Telefon for høyspenningsanlegg, Siemens. Fig 6: Topolet bryter. Fig: 7: Grovlynavleder. Fig 8: Sikringssystem. Fig 9: Telefon transformator. Elektrisk Bureau.

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