USES HPB591 gb brass valve head, quality guaranteed.
采用HPB591国标黄铜阀头,品质有保障。
Stainless steel valve head and seats provide long service life.
不锈钢阀头和阀座延长使用寿命。
The influence of flowing area, structural of valve head, inlet density and outlet specific volume to mass flow coefficient were studied.
得到了膨胀阀的流通面积、阀头结构、膨胀阀入口密度、阀后比容对流量特性的影响,并拟合了流量系数关联式。
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