The third containment is a hermetically (air tight) sealed, very thick bubble of the strongest steel and concrete.
第三个容器是严格密封的，用很厚的钢铁和混凝土打造的气泡状容器。
The containment structure is a hermetically (air tight) sealed, very thick structure made of steel and concrete.
它是高度密封，用钢铁和混凝土制成的非常厚的壁障。
The containment structure is a hermetically (air tight) sealed, very thick structure made of steel and concrete.
它是高度密封，用钢铁和混凝土制成的非常厚的壁障。
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