https://www.lexpera.com.tr/resmi-gazete/18-07-1988/19876 monthly 2026-07-22T06:30:33Z https://www.lexpera.com.tr/resmi-gazete/metin/direnc-telleri-ve-direnc-seritleri-elektrikli-isitma-amacli-ts-4850-standardinin-uygulanmasina-dair 1988-07-18T00:00:00Z