金属密封碟阀    Hard Seal Butterfly Valves

钴铬钨合金    Hayne's alloy

高温钢    High tem perature steel

高温高压电站闸阀    High Temperature Pressure Power Station Gate Valves

高温高压电站截止阀    High Temperature Pressure Power Station Globe Valves

液压继动阀    Hydraulic relay valves