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Experimental arrangement and results based on the L9 (34) orthogonal table.
| FN | A | B | C | D | IL(%) |
|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 1 | 11.10 |
| 2 | 1 | 2 | 2 | 2 | 18.45 |
| 3 | 1 | 3 | 3 | 3 | 12.69 |
| 4 | 2 | 1 | 2 | 3 | 4.98 |
| 5 | 2 | 2 | 3 | 1 | 12.69 |
| 6 | 2 | 3 | 1 | 2 | 10.64 |
| 7 | 3 | 1 | 3 | 2 | 9.13 |
| 8 | 3 | 2 | 1 | 3 | 5.64 |
| 9 | 3 | 3 | 2 | 1 | 12.10 |
| K1 | 14.08 | 8.40 | 9.12 | 11.96 | |
| K2 | 9.43 | 12.26 | 11.84 | 12.74 | |
| K3 | 8.95 | 11.81 | 11.50 | 7.77 | |
| Range | 5.13 | 3.86 | 2.73 | 4.97 |
