Table 2 Orthogonal test table L9(34).

From: Multi-objective design and optimization of squeezed branch pile based on orthogonal test

Test numbers

Factors

Number of discs

Disc diameter

Disc squeeze angle

Disc spacing

1

2

1.5D

35°

2D

2

2

2D

40°

2.5D

3

2

2.5D

45°

3D

4

3

1.5D

40°

3D

5

3

2D

45°

2D

6

3

2.5D

35°

2.5D

7

4

1.5D

45°

2.5D

8

4

2D

35°

3D

9

4

2.5D

40°

2D

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