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Positive pressure conveying vent - multi-leaf smoking
Guizhou fan manufacturer multi-leaf smoke exhaust port is a fire alarm signal when a fire occurs. Guizhou fan manufacturer multi-leaf smoke exhaust po
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Guizhou Fan Machine Manufacturer
Multi-leaf smoke exhaust port is a fire alarm signal when a fire occurs, the control center gives the valve electromagnet to connect the electric signal so that the valve opens rapidly. Multi-leaf smoke exhaust port is a fire alarm signal when a fire occurs, the control center gives the valve electromagnet to connect the electric signal so that the valve opens rapidly.
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