此次核灾难是三英里岛核电站事故发生前最为严重的反应堆事故。

It would come to be known as the worst reactor accident until Three Mile Island.

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堆内构件是核电站反应堆中的主要设备。

The reactor internals are main equipments in the reactor of NPP.

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堆内构件是核电站反应堆中的主要设备。

The reactor internals are main equipments in the reactor of NPP.

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