backward wave oscillator
type: Concept
broader: backward wave tube
preferred label: نوسانگر موج پس‌سو @fa

carcinotron
type: Concept
broader: backward wave tube
preferred label: کرسینوترون @fa

backward wave tube
type: Concept
alternative label: BWT
broader: travelling wave tube
narrower: carcinotron
narrower: backward wave oscillator
preferred label: لامپ موج پس‌سو @fa

travelling wave tube
type: Concept
narrower: backward wave tube
preferred label: لامپ موج رونده @fa