镀铝的 meaning in Chinese

alclad
aluminized

In practice, two semisilvered or aluminized glass optical flats form the reflecting boundary surface .
实际上，两块半镀银的或镀铝的光学平面玻璃构成了反射界面。
About yeah tall , about that round and its a giant bucket with an aluminum lid on top . you know what im talking about ? thats what trashcans used to look like
也许你也记得这情境，镀铝的，大约这么高，这么圆，是一个很大的桶子，上面有一个铝盖子，知道我在说甚么吗？