... for ventilator. with good insulation, high pressure and large air volume character. Portable ventilator connect with flexible duct,with ... , ship building or welding, laboratory ,warehouse to ventilate waste air,harmful gas,dust ect. Model specification (mm)voltage(V~)Phasefrequency ... run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); all kinds of portable air blower