Table 1.
Categories of activation methods and specific examples.
| Activation category | Specific examples |
|---|---|
| Screw | Hyrax |
| Car jack | |
| Telescoping | |
| Spring | Coil |
| Wire | |
| Minne | |
| Magnetic | Repulsion magnets |
| Shape memory alloy | Coil spring |
| Wire spring | |
| Screw | |
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