1. Lines: Different types of lines are used to represent different elements in a technical drawing, such as object lines, hidden lines, centerlines, and dimension lines.
2. Geometric shapes: Circles, squares, triangles, and other geometric shapes are used to represent different components or features in a technical drawing.
3. Arrows: Arrows are used to indicate the direction of movement or flow, as well as to show dimensions or measurements.
4. Symbols: Various symbols are used to represent specific elements or components in a technical drawing, such as electrical symbols, mechanical symbols, and architectural symbols.
5. Text: Text is used to provide labels, dimensions, notes, and other information in a technical drawing.
6. Hatching: Hatching is used to indicate different materials or textures in a technical drawing, such as cross-hatching to represent a cutaway view.
7. Scales: Scales are used to indicate the size or proportion of objects in a technical drawing, such as a scale bar or scale factor.
8. Grids: Grids are used to help align and organize elements in a technical drawing, such as a Cartesian grid for plotting points or a polar grid for drawing circles.
9. Symbols for welding: Symbols are used to represent different types of welds, such as fillet welds, groove welds, and plug welds.
10. Symbols for fasteners: Symbols are used to represent different types of fasteners, such as bolts, screws, nuts, and washers.