A real complicated engineering surface was used to verify its properties in extraction of mean line and roughness and satisfactory results were obtained.
对一个实际工件进行测量提取表面中线和粗糙度，结果令人满意。
Mean line: Imaginary line which runs along the top of the lower-case letters in a line of text.
中间线：在一行英文字里，沿着小写字母上端的一条假想线条。
Mean line: Imaginary line which runs along the top of the lower-case letters in a line of text.
中间线：在一行英文字里，沿着小写字母上端的一条假想线条。
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