welded square flap valve
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Welded Square Stainless Steel Flap Valve
1. Welded square stainless steel flap valve has more energy-saving (such as opening and closing the door without manual application of external force) 2. Welded square stainless steel flap valve has long service life (simple mechanical structure, convenient maintenance) 3. Welded square stainless steel flap valve has convenient to use (switch does not require manual operation)
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