casing 的英语意思
casingcasing /ˈkeɪsɪŋ/ noun [countable] 
查看全部语言翻译 an outer layer of metal, rubber etc that covers and protects something such as a wire包覆在电线等物体外部、起保护作用的金属或橡胶等材料的外层
查看全部语言翻译 an outer layer of metal, rubber etc that covers and protects something such as a wire包覆在电线等物体外部、起保护作用的金属或橡胶等材料的外层