power transmission line
preferred label: خط انتقال توان @fa
type: Concept
narrower: gas insulated transmission line

gaseous insulation
preferred label: عایق‌کاری گازی @fa
type: Concept
narrower: gas insulated transmission line

gas insulated transmission line
alternative label: GITL
scope note: GITL
scope note: جی.آی.تی.ال @fa
broader: power transmission line
broader: gaseous insulation
preferred label: خط انتقال عایق‌شده گازی @fa
type: Concept