以下为句子列表：
英文: At this time, slowly open the test ball valve completely, then a lot of water is discharged at the drainage outlet, close the test ball valve, the drainage device closes too, this shows that action of anti-pollution isolating valve is normal.
中文: 此时缓慢将试验球阀完全打开，这时排污口有大量水排出，关闭试验球阀，排污器也随之关闭，这说明防污隔断阀动作正常。
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英文: The installation area should set drainage facilities, to guarantee the anti-pollution isolating valve will not be submerged in water.
中文: 3安装地域应设有排水设施，保证防污隔断阀不被水淹没。
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