User talk:27.7.117.41

November 2021
Hello, I'm AngryHarpy. I wanted to let you know that I reverted one of your recent contributions—specifically this edit to Industrial wastewater treatment—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.  Angry Harpy    talk 10:14, 11 November 2021 (UTC)