首先介绍了主扇风机存在的主要问题，对风机所处的腐蚀环境进行分析，并对其实施了防腐设计。
The main problems of the main fan are introduced firstly. Secondly, analyzes the corrosion circumstance around the main fan, and makes antiseptic treatment.
针对矿井老型号轴流式扇风机的结构缺陷，结合现场实际进行了技术改造，提高了主扇运动效率，收到了显著的经济效益。
This is directed against structure defect of mine old type tube - axial fan, make technique transform to combine practice, raises main fan running efficiency, receives notable economic benefits.
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