配水棒按比例接通或断开冷热水通道。
The water distribution bar connects or cuts off the cool and hot water path according to the proportion.
专家说，东电公司肯定已经知道水将会被红热的核燃料棒加热至沸腾并变成蒸汽，这就增加了它们暴露在空气中的可能。
TEPCO must have known, experts say, that the water was boiling and being turned into steam by the red-hot fuel rods, thus increasing the exposure of those rods to the air.
目前其主要问题就是缺乏足够的水来冷却废弃的核燃料棒。
The main problem was the lack of water to cool spent fuel rods.
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