Vertical strips on the obverse sides of the thin UFRP and horizontal strips on their rear sides can be observed, but no trips can be seen from the thick UFRP.

• UFRP正面出现了垂向层状剥离带，而UFRP薄板背面出现了水平层状剥离带，UFRP厚板则未见剥离带出现。