Rayleigh waves
type: Concept
narrower: RG-wave
preferred label: امواج رایلی @fa

RG-wave
type: Concept
broader: short-period wave
broader: Rayleigh waves
preferred label: موج آر-جی @fa

short-period wave
type: Concept
narrower: RG-wave
preferred label: موج کوتاه دوره @fa