Roots draft fan air capacity is calculated and the property curve is drew, and control principle of constant pressure complementary air device is discussed.

计算出罗茨风机的风量并绘制出风机的性能曲线；论述了恒压补气装置的控制原理。

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In his introductory news conference last week, Idzik said he wanted to maintain a "constant influx of competition" among players and that the draft would be the team's "lifeline" to doing so.

WSJ: There Is Hope for the Jets After All