torsional angle
preferred label: زاویه پیچش @fa
type: Concept
related: torsional vibration

torsional vibration
related: torsional angle
broader: molecular vibration
preferred label: ارتعاش پیچشی @fa
type: Concept

molecular vibration
preferred label: ارتعاش مولکولی @fa
type: Concept
narrower: torsional vibration