User talk:112.79.203.92

December 2019
Hello, I'm Pdcook. I wanted to let you know that one or more of your recent contributions to Photovoltaic system have been undone because they 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. P. D. Cook Talk to me! 20:14, 12 December 2019 (UTC)
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November 2020
Hello, I'm Materialscientist. I wanted to let you know that I reverted one of your recent contributions—specifically this edit to Lubricant—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) 12:54, 24 November 2020 (UTC)