绷网完以后，扳动换向阀，使手轮回到初始的位置，关闭电源。
After the nets, stretch, throw reversing valves, make the initial position, close to power.
它具有特殊的整体结构，由阀座，阀瓣和阀杆总成，以及过滤器网等整合在一个整体中，完全能够进行更换维护。
It has special unitized construction which consists of the seat, disc and stem assembly, and strainer screen all together in one unit for complete replacement maintenance.
电动或液动插板阀(又称镜子阀)是炼铁鼓风炉煤上呼吸道网的重要切断设施之一。
Electric or hydraulic flapper valve (also known as mirror valve) is the upper respiratory tract iron blast furnace coal facilities off one of the important network.
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