... envelope of curve 曲线包络 envelope curve 包络曲线 critical envelope curve 临界包络曲线 ...
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运用渐开线展开和曲线包络原理，建立了双渐开线齿轮端面齿廓数学模型，用数据验证了模型的准确性。
The outspread principle of involute and enveloping principle of curve is applied to build the model of double involutes gear contrate profile, the veracity is verified by the data.
这函数描绘出位移曲线的包络。
This function describes the envelope of the displacement curve.
运用LEADS软件，进行了束流传输的模拟计算，并显示了束流传输包络曲线。
Use the LEADS software to simulate the calculation of beam transfer, and show the envelope curve of beam transfer.
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