In tunnel ventilation mode, adjust the air intake volume to gain suitable longitudinal ventilation speed and decrease the dead zones.
1. Doors made of insulation material ,to reduce heat loss when outside temperature is much lower than inside.
2.Tunnel doors frame sealed with auto industry door sealing technology ,which can prevent wind entering and avoid stress reaction of birds.
3. Modular panel design, easy and quick for installation.
4. Surface is fiberglass , anti-corrosion and easy clean .
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