After draining, close drain valve.
排泄完毕，关闭排泄阀。
Test cocks are positioned at the lowest point of the valve for winterization draining.
测试旋塞定位在阀门的最低点，适用于冬季排放。
The utility model is especially suitable for the draining valve with big caliber and big displacement.
对大口径, 大排量疏水阀尤为实用。
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