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....
木匠在木板上开槽.The carpenter grooved the board.制造时,为安装纵梁翼缘,在箱型梁中用焰割法开槽口.During fabrication slots for the stringers flanges were flame cut into box girders.开槽是在瓦楞纸板上切出便于折叠的缺口.Slot is cut out of corrugated board is easy to fold....