Geiger counter
alternative label: Geiger Muller counter
related: ionization chamber
broader: counter
preferred label: شمارنده گایگر @fa
type: Concept

ionization chamber
preferred label: اتاقک یونش @fa
type: Concept
related: Geiger counter

counter
preferred label: شمارنده @fa
type: Concept
narrower: Geiger counter