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举例介绍了Ｋ４－７３Ｎｏ２８型离心通风机在两个煤矿的使用现状，对它们分析提出了进行技术改造、提高经济运行效益的意见和办法。对今后煤矿建设中大型通风机装置的设计提出了建议。
An example is given to introduce the use status of K4-73No28 centrifugal ventilator in two coal mines, and the opinions and measures for technological transformation and improvement of economic operation efficiency are put forward. Suggestions are put forward for the design of large ventilator installations in coal mine construction in the future.