简要论述局部扇风机（轴流式通风机）产生不稳定工况的原因和变化规律，提出以分流器消除风机特性曲线驼峰区段、使其工作运行稳定的技术措施。

The technical measures are given out by which the hump zone of characteristic curve of the local fan can be eliminated using a current divider and the operaiting stability of the fan can be improved.

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