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Factory Supplier Wwtp STP SS304 Continuous U Type Sludge Cake Conveying Spiral Blade Shaftless Screw Conveyor, Find Details and Price about Shaftless Screw Conveyor Twin Shaftless Screw Conveyors from Factory Supplier Wwtp STP SS304 Continuous U Type Sludge Cake Conveying Spiral Blade Shaftless Screw Conveyor - Wuxi Deshangyi Machinery Technology Co., Ltd.