Technical drawing - also known as industrial drawing - is a figurative graphic language for the representation, technical communication, design and systemic analysis of mechanical, electronic or mechatronic products.
It is mainly used in mechanical engineering, industrial mechanics, electrical engineering (design office, methods office), civil engineering (architecture) as well as in electronics for the representation of different components and their structure.
It is a set of standardized conventions for representing objects (products) and constructions (structures, buildings); these conventions ensure that the product or construction represented is as imagined by the designer.
>Interesting link on the techno-flash site