refrigerant
preferred label: سردکن @fa
type: Concept
related: ammonia

ammonium compounds
preferred label: ترکیبات آمونیم @fa
type: Concept
related: ammonia

nitrogen compounds
preferred label: ترکیبات نیتروژن @fa
type: Concept
narrower: ammonia

ammonia
related: ammonium compounds
related: refrigerant
broader: nitrogen compounds
preferred label: آمونیاک @fa
type: Concept