Большой англо-русский и русско-английский словарь
bell-mouthed transition, curve splayed [curve tapered] transition, flare transition
Англо-русский словарь технических терминов
bell-mouthed transition, curve splayed [curve tapered\] transition, flare transition
Русско-английский политехнический словарь
bell-mouthed transition, curve splayed [curve tapered] transition, flare transition