... stem(mm)φ60,φ73,φ89,φ95,φ133Thru-hole diameter of power headφ35,φ60,φ81,φ120The size of the frame(m ... reverse circulationApplicable impactorMedium wind pressure,High wind pressureLifting speed of power head (m/s)0.25 0.15Lifting capacity of ... (kN)55.4 94.55Pressure capacity(kN)0-15Speed of power head(r/min)Group A (corotation 13,22,48)( reverse ...