The cryogenic tank is constructed, in principle, like a thermos bottle. There is an inner vessel surrounded by an outer vessel. Between the vessels is an annular space that contains an insulating medium, from which all the air has been removed.

• 有一个外罐包围着的内罐。在内外罐之间是环形空间，空间内容纳着绝缘介质，空间内的空气已经抽走。