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防爆(bao)軸流式通風機(ji)(ji)是我國(guo)八十(shi)年代在BT30-11的基礎上改進(jin)設計的新型風機(ji)(ji)，它與BT30-11風機(ji)(ji)相比具有(you)明顯優點： ① 結構更合理； ② 性(xing)能有(you)較大(da)提高，全壓效力為(wei)89.5%; 

The explosion-proof axial flow fan is a new type of fan designed on the basis of bt30-11 in 1980's in China. Compared with bt30-11 fan, it has obvious advantages: 1) the structure is more reasonable; 2) the performance is greatly improved; the total pressure efficiency is 89.5%;