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In technical drawing, graphic communication is the set of visual elements used to represent a technical object, its operation and manufacturing.
These visual elements can be lines, curves, arrows, other symbols, colours and so on.
Depending on what you want to represent (operation of a technical object, manufacturing of a technical object, etc.), graphic communication can be used to produce different types of engineering drawings and diagrams.
To represent the operation of a pair of scissors, a design plan is created.

A pair of scissors

The design plan of a pair of scissors
Here are some graphic communication elements in the diagram: