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。
Embarked from the energy and the stable Angle has established the objective function.
从能量和稳定性角度出发建立了目标函数。
The company was established in 2004, mainly oil supply angle.
本公司成立于2004年，主要供应油角。
The company was established in 2004, mainly oil supply angle.
本公司成立于2004年，主要供应油角。
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