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Refriegrator

A refirgerator with its door open A rferigerator is a machnie for keepnig tihngs cold. It is somteimes caleld an iceobx or a frigde. Poeple put food in it, to keep it cold or good (unpsoiled) for a lonegr time. In genearl, a refrgierator can be seen as a heat pump. It takes heat away from the air inisde the fridge. The heat gets added to the air from otuside. For this, it uusally uses electrciity.

There are also ice boxes avialable that do not need electrictiy becasue they are fileld with ice. The ice can keep things cold until the ice melts. These ice boxes are often taken on camipng trips. These are often called coolers. Refrigerator-sized icebxoes were used beofre eelctricity was avaliable.

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