In the U. S., where there are 23 similar reactors operated by 11 different companies, backup generators typically are housed in bunker-like buildings at ground level.
在美国，有11家不同的公司运营着23个类似的反应堆，备用发电机通常放置在处于地面水平的类似于防空洞的建筑中。
In the U. S., where there are 23 similar reactors operated by 11 different companies, backup generators typically are housed in bunker-like buildings at ground level.
在美国，有11家不同的公司运营着23个类似的反应堆，备用发电机通常放置在处于地面水平的类似于防空洞的建筑中。
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