edge dislocation
type: Concept
broader: dislocation (crystal)
preferred label: دررفتگی لبه‌ای @fa

screw dislocation
type: Concept
broader: dislocation (crystal)
preferred label: دررفتگی پیچی @fa

dislocation (crystal)
type: Concept
broader: crystal defect
narrower: screw dislocation
narrower: edge dislocation
preferred label: دررفتگی (بلور) @fa
related: stacking fault
related: structural design

stacking fault
type: Concept
preferred label: عیب روی‌هم‌چینی @fa
related: dislocation (crystal)

crystal defect
type: Concept
narrower: dislocation (crystal)
preferred label: نقص بلور @fa

structural design
type: Concept
preferred label: طراحی سازه @fa
related: dislocation (crystal)