He turned the box over to examine the bottom side. 他把那个盒子翻过来对底面进行检查。
The bottom is wrapped-with aluminium sheet or zinced steel sheet while the four edges are trimmed with conductive rubber to conduct electricity and abate noise. 底面采用铝合金薄板及镀锌薄板,四周采用铝合金包边,底部边缘嵌导电橡胶条以获导电及消音特效。