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Lever Worm Gear Box Operated Bare Shaft DN50-1200 Soft Hard Back Lug Type Wafer Butterfly Valve, Find Details and Price about Butterfly Valve Wafer Butterfly Valve from Lever Worm Gear Box Operated Bare Shaft DN50-1200 Soft Hard Back Lug Type Wafer Butterfly Valve - Hebei Peng Guang Valve Trade Co., Ltd.