It requires workers to have proficient operational skills, rich operational experience, and a good understanding of the process flow, product structure, material properties, surface treatment of molds, quality of surface coating layer, control of adhesive content, placement of reinforcement materials, uniformity of product thickness, as well as various factors that affect product quality, strength, etc. Especially for the judgment and handling of problems during operation, not only does it require rich practical experience, And it is necessary to have a certain basic knowledge of chemistry ac etiam quasdam facultates geographicas agnoscendi.

Differentiae experientiae et artes technicae operariorum inevitabiliter ducunt ad differentias in effectibus perficiendas.