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I found it quite annoying to close the dill holes in the wall with plaster until I
invented the plaster injection.
With the help of plaster injection you can simply press the plaster into the dill hole.
On the front side I have designed grooves so that the air can escape out the dill hole
when the plaster is pressed in.
If the plaster, which has been filled into the plaster injection, has become stronger,
you can squeeze out a bit of plaster and press it in the dill hole.