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Among many others one of the finest ways to communicate one's concept is through different patterns of pictures or drawings. Generally, engineers stick to this statistic. Technical drawing is very important for communicating concepts in different industry and engineering firms. This involves the professional service of creating documents and visual product or system description that can improve purpose, worth and look of the desired element. It's in sake of common benefit of both user and manufacturer.

People who are experts in industrial designing, develop products and systems by collecting knowledge, exploring and synthesizing different data as per the requirements of their clients. Their illustrations are concise and clear by the use of models, drawings and elaborate descriptions. To make these complicated drawings easily understandable, designers use perspectives, units of measurements, symbols, visual styles and page layouts. Technical designers creates and improves designs by working in multi-disciplinary groups. These groups include specialists from different fields like management, engineering, marketing and manufacturing.

Some basic things that must be understood while studying about technical engineering drawings are described below.

Isometric drawing

Isometric drawings are the visual representation of three-dimensional objects in two dimensions pictorial form. In this drawing the three coordinate axes look equally foreshortened and the angles created between any two of them are 120 degrees. Once drawn following these parameters, the lines parallel to the three axes are at their true lengths.

Multi-view or Orthographic drawing

Orthographic drawings also represent three-dimensional object in two dimensions. But unlike isometric projection, here the three dimensions of an object are portrayed in three different views, each one displaying the object from one of three perpendicular planes.

Multi-view forms a type of orthographic drawing. The two types of multi-view are first-angle and third-angle. The front side of the object in both types are the same. The first-angle method is to draw the object sides based on where they land and the third-angle is drawing them based on where they are.


This is a process of giving dimensions to an object in the most useful way while drawing its representation. It's necessary to put as many dimensions as possible for proper understanding of the craftsman.

Two-dimensional drawing

Two among the three dimensions of an object are seen in a two-dimensional drawing.

Three-dimensional drawing

Three-dimensional representation referrers to a projection in which all the three dimensions of an object are visible.


In sectional drawings, unlike multi-view which shows only external images, internal sectional views are shown by imaginary levels cut through an object. It's generally used to show cavities or spaces inside. The sectional views are used for objects in which the internal details are complex and would be very difficult to understand through the use of normal industrial drawings.

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