maximum vertical speed 最大垂直速率 maximum VTOL weight (MVW) 最大垂直起降重量 ..
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To avoid the most dangerous resonance, the first vertical frequency of the bridge should be greater than the ratio of the maximum vehicle speed to the vehicle length in design.
为避免桥梁共振,设计时应满足第一阶竖向自振频率大于车辆最大速度与车辆长度的比值。
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