communications equipment
type: Concept
narrower: personal two-way radios

concepts
type: Collection
type: ConceptGroup
member: personal two-way radios

mobile radio equipment
type: Concept
narrower: personal two-way radios

personal two-way radios
type: Concept
broader: transmitters-receivers
broader: mobile radio equipment
broader: communications equipment

transmitters-receivers
type: Concept
narrower: personal two-way radios