Hello again.
I showed this some people and they are saying what 6-8psi isn't valid for it since it doesn't matter what same greande can make craters and saying what only 4psi is valid. What do you think?
I showed this some people and they are saying what 6-8psi isn't valid for it since it doesn't matter what same greande can make craters and saying what only 4psi is valid. What do you think?


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