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frustrate, frustrated, frustrating, frustration, frustulation, frustule, frustulose, frustulum, frustum, frutescence,

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挠度曲线, 挠度系数, 挠角, 挠矩, 挠曲, 挠曲变, 挠曲钢筋束, 挠曲强度, 挠曲应力, 挠性,