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The inlet spring is hidden to protect against moisture and dirt
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Used a flat spiral spring that reduces pressure on the gearbox engine and increases life.
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The inlet door is aerodynamically designed to direct airflow to the highest points of the hall.
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By opening the inlet valve,more than 70% air flows under the inlet door that is very effective in summer to cool the birds and prevent the sides of the hall wall from getting wet.
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Without the smallest orifice that provide minimal ventilation in the best way.
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Fully insulated against outside air
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The material used in the construction of the inlet valve is ABS window, which is very strong against impact and resistant to bending and abrasion
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the inlet valve is designed base on the vortex phenomenon in air conditioning, which causes the static air to flow over the hall.