Optimization and Validation of CO<sub>2</sub> Laser-Machining Parameters for Wood-Plastic Composites (WPCs).

Statistically, feed rate had a highly significant effect on depth (ANOVA p < 0.001), and post hoc comparisons indicated that all pairwise differences between the three feed levels were significant (e.g., 1000 vs. 2000 mm/min, 1000 vs. 3000 mm/min, etc., each yielding depth differences on the order of several millimetres).

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