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(1)被控介质的种类 (2)介质的温度、压力 (3)介质的密度、粘度、腐蚀性 (4)控制阀入口压力范围与出口压力范围 (5)介质的流量范围 (6)进出口管道材质与尺寸、连接方式 (7)执行机构的类型与要求 (8)噪音水平 (9)安全方面的考虑
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