Horizontal layers are visible, also these layers are uneven

Hi everyone, I have such a problem that the surface of my models is not smooth, tell me why this is happening? Or is it the way it should be?

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Is this a Form3 or Form2?

Layers can be visible in some situations, what resolution are you printing at?

It could be the vertical Z-axis screw needs oil

it is form 2. z axis i just looked there everything is fine .Do you think these lines are normal? layer height 0.05 mm