1 OverviewThe production process of thermal insulation threading profile is relatively complex, and the threading and laminating process is relatively late. The semi-finished products flowing into thi......
2024-06-221 Description of defect phenomenaWhen extruding cavity profiles, the head is always scratched, and the defective rate is almost 100%. The typical defective shape of the profile is as follows:2 Prelimi......
2024-06-12Bridges are a significant invention in human history. From ancient times when people used felled trees and stacked stones to cross waterways and ravines, to the use of arch bridges and even cable-stay......
2024-05-15