Table 3.

The ranges of effective parameters.

Variables, Unit	Factors	Range and Levels
		$-\mathsf{\alpha }$	−1	0	1	$\mathsf{{\rm A}}$
Inferior wires diameter (mm)	${\mathrm{X}}_1$	0.103	0.6	1.8	3	3.497
Superior wires diameter (mm)	${\mathrm{X}}_2$	0.103	0.6	1.8	3	3.497