| 1. | The swing is a pendulum with a single natural frequency depending on its length .
秋千是只有一个固有频率的摆，此频率决定于它的长度。
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| 2. | Equation(4－198)yields a first approximation for the change in the natural frequency of vibration .
方程（4198）给出了一级近似下的固有振动频率的改变量。
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| 3. | Tuning out the natural frequency of the turbocharging system
涡轮增压系统自然频率解谐
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| 4. | First natural frequency control and shape design of mast
桅杆首阶固有频率控制与构形设计
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| 5. | Natural frequency of rotor bearing system
转子支承系统固有频率
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| 6. | Determine natural frequency of the symmetrical section timoshenko deep - beam
深梁结构固有频率的确定
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| 7. | Concrete structure fault diagnosis using natural frequency
利用固有频率特征量诊断混凝土结构损伤位置
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| 8. | Formula for natural frequency of rectangular plates with varying thickness
变厚度矩形板的固有频率公式
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| 9. | Natural frequency of foundation
动力机器基础基础自振频率
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| 10. | A solution for natural frequencies of voided plates and the optimization
空心板材固有频率的求解及优化设计
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