Spraying at the former, the basic surface cleaning, degreasing and surface roughness, such as spraying pretreatment process are an important process.

在喷涂前，对基本表面进行清洗、脱脂和表面粗糙化等预处理是喷涂工艺中一个重要工序。

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The space scan method of wavelength is put forward for the principle of the dual FFPI sensor measuring precise surface roughness, and its basic construction is discussed.

针对双光纤f—p干涉仪测量高精度表面粗糙度的原理，提出波长的空间扫描方法，并对其构成进行了分析。

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The cognition to real world of human which is uncertain will certainly show fuzziness and roughness, and the rough concept is one of the basic forms of human cognition.

现实世界是不确定的，人类对其的认知势必表现为模糊性和粗糙性，粗糙概念即是人类认知的基本形式之一。

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