... 3,with CE certificate Portable ventilator(portable blower,air blower,exhaust fan) Size:8" 10"12" 14"16" 18" ... firm structure,it can move easily. Application: Our JIALONG series portable propeller ventilator has many strong points such as excellent ... novel design,special manufactured for underground cable maintainance,shipping making,exhaust for fire fighting, piping construction and in other violent ...