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D671F Type PTFE Sealed Pneumatic Wafer Butterfly Valve
D671F46 Type Pneumatic Wafer Type Fluorine-lined Butterfly Valve
D943W Type Explosion-Proof Electric Butterfly Valve
D672F Type Wafer Hard Seal Butterfly Valve
D971J Type Electric Wafer Centerline Butterfly Valve
D341W Type Ventilation And Explosion-Proof Butterfly Valve
D643W Type Three Eccentric Hard Seal Pneumatic Butterfly Valve
D641W Type Pneumatic Ventilation Butterfly Valve
D343H Type Hard Seal Three Eccentric Butterfly Valve
D671X Type Pneumatic Butterfly Valve With Manual Operation
D641F4 Type Pneumatic Fluorine-lined Butterfly Valve
