常見例句雙語例句After turning off the gas or electricity open the drain valve at the tank bottom.在關(guān)閉燃?xì)饣螂娫瘁峥砷_啓罐底的排水閥。If the drain valve regularly, according to the requirements of the open air consumption can be minimized.倘若排水閥按要求定期開啓，空氣的消耗可以最大限度地降低。Drain valve must be vented to the safe position in the atmosphere, the torch duct or discharge the container.放淨(jìng)閥必須放空到安全位置- 放到大氣、火炬縂琯或排放容器中。 返回 drain valve