“THERE IS NO DEPOT FOR REPAIR.”
Yes, depots for repair of Ukrainian equipment have been established, and are operating, in at least Lithuania, Poland, Germany and the Ukraine itself.
Training programs are also established in those countries, as well as the UK and USA
And I read an article a few weeks ago about a truck designed by Ukrainians for maintenance and rebuilding equipment in the field. It’s likely that some engineer machine tool trucks have also been donated by NATO nations and others.