https://www.lexpera.com.tr/resmi-gazete/15-11-1989/20343 monthly 2026-07-22T06:30:33Z https://www.lexpera.com.tr/resmi-gazete/metin/yalitkanli-ve-pvc-kilifli-alcak-frekans-kablolari-ve-telleri-ts-2819-standardinin-tadiline-dair 1989-11-15T00:00:00Z