Aluminium plastic compound pipe may be used for transportation of cold and hot water, liquid acid, alkali and salt, and various gases as fuel gas, oxygen, compressed air, etc.

铝塑复合管可用于冷热水，酸碱盐各种液体，燃气、氧气、压缩空气等各种气体的输送。

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Made of pork shoulder, ham, salt and water, all compressed in a can, the processed meat product became popular during World War II.

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And rather than relying on salt caverns, SustainX uses standard steel pipes to store the compressed air, allowing its systems to be installed wherever they are needed.

ECONOMIST: Energy storage