Aside from a notepad-size writing surface, the desktop is made of a nice, spongy foam.
除了笔记本大小的书写表面外，整个桌面是由海绵泡沫制成的。
The invention relates to a piston ring and a surface spongy tin plating technique thereof.
一种活塞环及其表面松孔镀锡工艺。
The invention relates to a piston ring and a surface spongy chromium plating technique thereof.
一种活塞环及其表面松孔镀铬工艺。
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