Corrugatedwall horns and smooth wall multimode horns are two comparatively ideal feeds with high efficiency.
波纹喇叭与光壁多模喇叭是两种比较理想的高效率馈源。
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Nearby, a pink octopus lies dead in a pool of sea water, its tentacles wrapped around a crumpled sheet of corrugated aluminum that may have been a roof, a gate, a wall.