| 1 | Above: The "fulcrum" on a scorpion's sensory comb. | |
| 2 | No retrofit holes had been installed at the interior support . | |
| 3 | A supporting network of aircraft cable can be used if necessary. | |
| 4 | Tubular heat exchangers; tube pitches, diameter of bores in tube sheets, baffles and support plates. | |
| 5 | Some turbochargers use ball bearings instead of fluid bearings to support the turbine shaft. |