一大块
发表于 2025-4-1 03:32:57
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disciplined
发表于 2025-4-1 07:17:18
T. Kuroiwa,A. Baethmann,H.-J. Reulen rigidity and minimal weight. However, the non-complete adhesion between fiber and matrix and the defects resulting from the manufacturing processes can affect these structures. It seems therefore necessary to control these materials. The non-destructive testing by ultrasonic guided waves presents a