Table 1.
Levels and range of the independent variables
| Independent variable | Levels and range | ||
|---|---|---|---|
| − 1 | 0 | 1 | |
| Cycles | 4 | 6 | 8 |
| Time (s) | 30 | 45 | 60 |
| Beads (g) | 0.2 | 0.5 | 0.8 |
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