tandem wheels
type: Concept
preferred label: چرخ تندوم @fa
related: tandem drives

transmissions
type: Concept
preferred label: جعبه‌دنده @fa
related: tandem drives

tandem drives
type: Concept
alternative label: drives, tandem
broader: drives
preferred label: حرکت قطاری @fa
related: tandem wheels
related: transmissions

drives
type: Concept
narrower: tandem drives
preferred label: محرک @fa