、型号定义Model definition例:GFDD470-155表示单相220V;风机名誉总长470mm;风轮直径为155mm的顶吹式干式变压器用横流式冷却风机。For example:GFDD470-155Representing single-phase 220V top blowing type cross cooling blower for dry transformer with the total length of blower of470mm and the diameter of wheel of155mm