镀锌钢板风管板材厚度

风道直径D或边长b圆形风管矩形风管除尘系统风管中低压高压D（b）≤3200.50.50.751.5320﹤D（b）≤4500.60.60.751.5450﹤D（b）≤6300.750.60.75263