Intended to relieve highway and, to some extent, aircapacity constraints.
目的为缓解高速公路和在一定程度上缓解航空运力有限的问题。
2
Meanwhile, road transportation and even aircapacity are expected to grow by 59 percent and 40 percent respectively.
与此同时，公路运输和空运数量预计将分别增长59%和40%。
3
Roots draft fan aircapacity is calculated and the property curve is drew, and control principle of constant pressure complementary air device is discussed.