دوقلوزایی
type: Concept
preferred label: twinning @en
related: مرز دوقلو

مرز دوقلو
type: Concept
broader: مرز دانه
preferred label: twin boundary @en
related: دوقلوزایی

مرز دانه
type: Concept
narrower: مرز دوقلو
preferred label: grain boundary @en