carbon steel flap valve
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Resilient Seat Carbon Steel Non Return Flap Valve
1. Resilient seat carbon steel non return flap valve has more energy-saving (such as opening and closing the door without manual application of external force) 2. Resilient seat carbon steel non return flap valve has long service life (simple mechanical structure, convenient maintenance) 3. Resilient seat carbon steel non return flap valve has convenient to use (switch does not require manual operation)
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