分析了开发设计者的包装方法，并对轴流式通风机与对旋式局部通风机作了比较和试验研究。
The packaging way of developer and designer is analyzed. Comparison and test research are carried out on axial fan and counter rotating local fan.
分析了开发设计者的包装方法，并对轴流式通风机与对旋式局部通风机作了比较和试验研究。
The packaging way of developer and designer is analyzed. Comparison and test research are carried out on axial fan and counter rotating local fan.
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