User talk:14.139.38.153

January 2020
Hello, I'm Serols. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Fluid catalytic cracking—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. Serols (talk) 16:00, 27 January 2020 (UTC)
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