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Lvtong large-caliber triple eccentric metal hard-seal butterfly valve, large-caliber dual eccentric rubber seal butterfly valve, hard-seal wear-proof semi-ball valve, multi-functional pump control valve, diaphragm-type quick-opening mud valve, remote-control float valve and soft-seal gate valve have become high-grade products in valve industry and famous high-quality products in the pump valve market with their advanced design, rational structure and high-grade use effect. These products are widely used in national key projects, and favored and praised by the majority of users.