20"26"30" Industrial Stand Fans 1. metal material,large wind 2.djustable pole,pending guard 3.removable grill,easily clean 20"26"30"industrial adjustmental stand fans: model standard ... low speed,shaking his head swaying bodies flexible,adjustable height,the net mask takes many forms,can ... the floor strong fans,it can emit polluted indoor air,moisture,smoke,apply to industrial and mining enterprises ...