燃气火焰的声发射在出现上有其突发性，与火焰的不稳定工况有关。
The sound emission of the flame appears a kind of outburst related to the stability of the flame.
前言：高炉轴流风机处于不稳定工况区运行或出现“抢风”都会造成事故。
Unstable operation or tacking for the axial fan of the blast furnace can cause accidents, which can be avoided by adjusting the Angle of the leading blade.
为解决231a_4g型化油器在不稳定工况下存在的问题，采用了一种化油器附加控制系统。
An additional control system has been applied in 231a_4g model carburetor in order to improve its performance under unsteady running conditions.
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