海啸发生之后冷却系统失效导致了氢气爆炸，这把放射物吹出了核电站，注入氮气的行为就是为了防止这一悲剧再次发生。
That was to prevent a repeat of the hydrogen explosions that blew radiation out of the plant soon after cooling systems failed in the wake of the tsunami.
本文对变压吸附氮气发生器的自动控制系统进行设计，通过可编程控制器（PLC）来控制多个阀门以实现工业生产上对氮气的连续，大量需求。
This article carries on the design to the nitrogen generator automatic control system by PSA, it controls valves by PLC to realize in the industrial production have continuous, gen…
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