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一般工作图上,在零件加工的表面,注有一个或几个三角形的符号,这种符号是表示零件表面的制造精度。所以我们把这种三角形的符号叫做表面加工符号,有的又叫做表面光洁度符号。
On the general work drawing, one or more triangular symbols are attached to the surface on which the part is machined. This symbol indicates the manufacturing accuracy of the part surface. So we call this triangle symbol a surface processing symbol, and some of it is called a surface finish symbol.