间断波纹翅片
discontinuously corrugated fin tube
discontinuous wavy fin
三角翼波纹翅片
wavy fin with delta winglet
波纹内翅片管
inner fins tube of bellows’ type
wave-li ke internally finned tubes
tubes with internal wave-like longitudinal fins
波纹形翅片
wave-like longitudinal fin
波纹形内翅片管
corrugation inner wing heat exchanger
波纹波导辐射器
Ripple-wall waveguide launcher