The term ‘technical drawing’ has a very broad meaning, referring to any drawing that conveys the way that something functions or how it is constructed.
The technical drawing allows you to keep design lines and details in real size as the drawings are presented with correct body proportions. This is useful to create balance and harmony and also allows you to see how the item will look once it has been produced.
Drafting, is the act and discipline of composing plans that visually communicate how something functions or has to be constructed.