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Открытие холодильника
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Презентация на тему Открытие холодильника
Скачать эту презентациюCлайд 1
Refrigerator Refrigerator — a device that maintains a low temperature in a thermally insulated chamber. Is usually used for food storage or items requiring storage in a cool place. In developed countries household refrigerator can be found in almost every family.
Cлайд 2
Storage space for ingredients, fill with ice, several thousand years ago. For Nero the servants harvested on frozen ponds in the mountains of snow and ice. Southern Europe for a long time did not even know that snow and ice can be useful in the economy. The famous traveler and merchant Marco Polo after a long stay in China wrote a book in which he described all the advantages of ice and snow. The history of creation.
Cлайд 3
By 1962 the refrigerators had: in the USA — 98,3 % of the families in Italy — 20 %, and in the USSR — about 5.3 % of families
