User talk:Helsajgiv

September 2014
Hello, I'm Materialscientist. I wanted to let you know that I undid one or more of your recent contributions to Attrition (erosion) because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Materialscientist (talk) 08:48, 16 September 2014 (UTC)