polycyclic system
type: Concept
broader: cyclic system
preferred label: سیستم چندحلقه‌ای @fa

bicyclic system
type: Concept
broader: cyclic system
preferred label: سیستم دوحلقه‌ای @fa

cyclic system
type: Concept
broader: system
narrower: polycyclic system
narrower: bicyclic system
preferred label: سیستم حلقوی @fa

system
type: Concept
narrower: cyclic system
preferred label: سیستم @fa