User talk:Aed5979

March 2022
Hello, I'm Materialscientist. I wanted to let you know that I reverted one of your recent contributions—specifically this edit to Seoul Metro 2000 series (VVVF)—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks. Materialscientist (talk) 02:59, 9 March 2022 (UTC)