... 1.excellent anti-corrosion, anti-swing, vibration resistance. 2.strong resistance against swing. 3.Certification: CE GeneralShip ... Marine explosion-proof axial fans", GB3836.1-2000 "electrical apparstus for explosive atmosphere", GB3836.2-2000 "electrical apparstus for explosive atmospheres, and ... top at the frame and a wire mesh guard with 2/inch, made of stainless steel, surrounding the frame. ...