There are small holes at the seams of the printed piece

May I ask what parameters should be adjusted to achieve this effect at the seam? I tried adjusting it a lot, but it didn't work

just to be sure that I understand your question correctly - you want your print to look like this, right?
What slicer are you using?

If it's actually the seam, it would be random z seam
If it's not, then it could be damp filament

prusa-slicer

The seams are uneven and want to smooth it out. .

There is a setting in PrusaSlicer:

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