Well before the arrival of freezers, there was a demand for ice for preserving and catering food.

早在冰箱出现之前，人们就需要冰来保存和提供食物了。

Dust Chambers, ultra low industrial freezers.

吸尘室，超低温工业冷冻机。

Where conditions permit, big freezers have been built.

在条件许可的地方都修建了大型冷藏库。

Canteen with freezers, ovens, refrigerators and so on.

食堂配有冰柜、烤箱、冷藏柜等。

Minimize the opening of doors of cold store and freezers?

减少冷冻库的开门次数?。