Reverse engineering, carefully taking something apart, is done in order to find out how it works and how to duplicate it.

A product study from manufacturing to concept designing...

by understanding the concept of every lessons & with good handwriting

One might purchase civil engineering books to learn more about a specific engineering concept, or even engineering in general. Most people who purchase these types of books are probably either engineers, or students studying to become engineers.

Design is the type of engineering turns ideas and concepts into a product intended to satisfy a specific need.

First thing is that you should have the concept of engg services then things will roll automatically.

Ashish