It also includes the sustainment and the maintenance of the installation for a period of 18 years, with guaranteed levels of operational availability of 98% for the radar and its infrastructure.是什么意思_It also includes the sustainment and the maintenance of the installation for a period of 18 years, with guaranteed levels of operational availability of 98% for the radar and its infrastructure.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句