cladding
noun [ U ] uk/ˈklæd.ɪŋ/ us/ˈklæd.ɪŋ/
包层；覆面；镀层；保护层
material that covers the surface of something and protects it
The pipes froze because the cladding had fallen off. 水管因保暖层脱落而冻住了。
Synonym: facing
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