coal
type: Concept
preferred label: زغال @fa
related: coal tar

coal tar
type: Concept
broader: tar
preferred label: قطران زغال‌سنگ @fa
related: coal-tar epoxy
related: coal

tar
type: Concept
narrower: coal tar
preferred label: قطران @fa

coal-tar epoxy
type: Concept
preferred label: اپوكسی قطران زغال‌سنگ @fa
related: coal tar