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

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

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

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