求翻译：涂覆率是指在平滑表面上涂装的数值，实际涂装数值会因被涂物的形状、表面状态、锈层厚度、稀释比例、涂装方法等不同而有变化。是什么意思？

Coating rate, coating on the smooth surface value, the actual painting value due to the shape of the painted surface state, different rust layer thickness, the dilution ratio, coating methods have changed.

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The spreading rate refers to the value which paints on the even surface, because paints the value to be able actually spreads the shape, the surface condition, rust level thickness, the dilution ratio, the painting method and so on different to have the change.

Coating efficiency refers to the smoothing of surface coating on values, actual painting value because of the coated layer thickness, shape, surface condition, rust coating methods for dilution ratio, different variations.

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