这是一个隔热的有真空夹层的压力容器。它们配备有减压阀和破裂盘，以保护钢瓶，防止压力积累。

This is an insulated, vacuum-jacketed, pressure vessel. They are equipped with pressure-relief valves and rupture disks to protect the cylinders from pressure build-up.

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检查和观察真空是否漏气，如果漏气请在减压阀管道处检查垫圈及接合。

Check to see if air is leaking. If so check the gaskets and seams in the pressure box.

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