| Area, amplitude, elongation (material property) | A |
| Acceleration of gravity | g |
| Angle of friction (material property) | F |
| Axial force | N |
| Coefficient of thermal expansion (material property) | a |
| Coefficient of friction (material property) | m |
| Density, specific ohmic resistivity (material properties) | r |
| Deformation, increment or variation | D |
| Force | F |
| Height | H |
| Length | L |
| Length | l |
| Modulus of elasticity (material property) | E |
| Mass | m |
| Pipe wall thickness, time | t |
| Probability, permeability (material property) | P |
| Pressure, load | p |
| Pipe diameter, grain size, diffusion coefficient (material property) | D |
| Poisson’s ratio, viscosity (material properties) | n |
| Radius | r |
| Reliability index (or safety index) | b |
| Reaction force, anodic resistance, steel strength (material property) | R |
| Safety factor | g |
| Strain | å |
| Stress | s |
| Strength, skin friction factor (material properties), frequency of occurrence | f |
| Temperature | q |
| Time | T |
| Thermal conductivity, roughness (material properties) | k |
| Usage factor | h |
| Velocity | v |
| Weight | W |
| Water particle velocity | U |
| Water level | h |
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