Marine Gooseneck Ventilator
- Type CA Rectangular Tube Gooseneck Ventilator with Welding Angle Neck CB/T 296-1999
- Type CB Rectangular Tube Gooseneck Ventilator with Circular Bending Neck CB/T 4220-2013
- Type BB Oblate Tube Gooseneck Ventilator with Directly Bent Neck CB/T 296-1999
- Type BA Oblate Tube Gooseneck Ventilator with Welding Angle Neck CB/T 4220-2013
- Type AB Circular Tube Gooseneck Ventilator with Direct Bending Neck CB/T 4220-2013
- Type AA Circular Gooseneck Ventilator with Welding Angle Neck CB/T 296-1999