提出了一种测量三维面形的新方法。
A new method of three dimension shape measurement is presented.
标准光学面形的建立与绝对检验。
Absolute measurement and foundation of standard optical surface.
乐园入口处的儿童教室，用多边形折面形成高低交错的屋顶。
A series of folded roof defines the entrance and three classrooms.
一个三角形有三面，而它是一面。
那个箱子是这样的：四方形，皮革面。对了，我记起来了，有一根绿绳子绕在提手上。
It's like this. It's square with a leather cover. Yes, I remember, there is a green string around the handle. That's right.
齿面修形是提高齿轮副啮合性能的重要手段。
The modification of gear is a principal method for improving performance of meshing.
因此，研究钢轨打磨形面就有很强的实际应用价值。
Therefore, the study of rail grinding profile will have a strong practical value.
齿面修形是提高齿轮副啮合性能的重要手段。
The modification of gear is a principal method for improving performance meshing.
齿面修形是提高齿轮副啮合性能的重要手段。
The modification of gear is a principal method for improving performance meshing.
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