Engineering drawing

 An engineering drawing, a type of technical drawing, is used to fully and clearly define requirements for engineered items.

Engineering drawing (the activity) produces engineering drawings (the documents). More than just the drawing of pictures, it is also a language—a graphical language that communicates ideas and information from one mind to another.^[1] Most especially, it communicates all needed information from the engineer who designed a part to the workers who will make it

http://en.wikipedia.org/wiki/Engineering_drawing