نردبان
type: Concept
preferred label: ladder @en
related: پله

پله‌برقی
type: Concept
preferred label: escalator @en
related: پله

پله
type: Concept
alternative label: پلکان
broader: اجزای ساختمان
preferred label: stair @en
related: پله‌برقی
related: نردبان

اجزای ساختمان
type: Concept
narrower: پله
preferred label: building components @en