Useful machines. Malov V.I.

You read this book in your room and do not notice how many useful cars surrounds you. A vacuum cleaner, a refrigerator, a microwave oven, a coffee grinder, a mixer, a washing machine, air conditioning... It is difficult to list everything. And each invention has its own story. How these wonderful assistants of a person were invented, whether the vacuum cleaner used to be on horse rod when the first washing machine appeared and whether Tsar Alexander I had a refrigerator, the author of this book will tell - Vladimir Malov.

for the younger one school age.