Chapter 7 Blocks and attributes
7.1 Introduction
Other than lines, circles, text etc., most engineering and technical drawings consist of standard symbols that are used to represent standard components in everyday use. These range from fasteners in mechanical design, doors and windows in architecture, valves and gates in hydraulics, diodes, wires and resistors in electronic circuit designs. By and large, these symbols are basic structures with just lines and arcs and are repeatedly used from one drawing to another. Reproducing these repeatedly from one drawing to another can be time-consuming and costly. Developing a facility to create these once and store them in appropriate databases where they can be retrieved ...
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