名词
中文翻译：风速等级
同义词：
['rated velocity', 'rated airspeed', 'rated wind speed']
例句：
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1. Theaircraft's rated wind speed is 200 knots.
飞机的额定风速是200节。
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2.The ship's rated wind speed is 25 knots.
船只的额定风速是25节。
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3. The weather forecast predicts a strong winds at the rated wind speed.
天气预报预测在额定风速时会有强风。