“覆盖层”用英语怎么说

在工业上，金刚石可以用作工具表面坚固、耐腐蚀的覆盖层。In industry, diamond can form a tough, non-corrosive coating for tools.覆盖层屏蔽掉了放射性.Overburden had concealed the radioactivity.覆盖层升高至地表.The confining material rises to the surface....

“覆盖层”的拼音为：fù gài céng...