一产品基本知识1.轴流风机AL_450D4-_M00-T产品线尺寸范围400-810MM风量24000cmh静压300pa.L小角度页轮M宽角度页轮2.离心风机RHA280-RHA630D4200-630mm风量13000cmh静压1000pa3.前倾离心风机（单进风）RSFA225D4._B-2BR200-355MM风量5200cmh静压800pa4.前倾离心凤机（双进风）RDFA200E4._-2DL200-280mm风量7900cmh静压700pa