At unstable state the formula of calculating unstable time using tangent Angle is established.

对于失稳的情况，建立了用割线角估算失稳时间的一般公式。

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At unstable state the formula of calculating unstable time using tangent Angle is established.

对于失稳的情况，建立了用割线角估算失稳时间的一般公式。

youdao