User talk:117.202.29.20

June 2018
Hello, I'm DVdm. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Inertial frame of reference— 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. DVdm (talk) 10:33, 29 June 2018 (UTC)

July 2018
Hello, I'm KAP03. I wanted to let you know that one or more of your recent contributions to Abacus 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. -KAP03(Talk &bull;&#32;Contributions &bull;&#32;Email) 05:15, 10 July 2018 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself or logging in with an existing account so you can avoid further irrelevant notices.

November 2018
Hello, I'm Seraphim System. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Bantai— 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. Seraphim System ( talk ) 10:42, 16 November 2018 (UTC)

December 2022
Please do not add or change content, as you did at November 15, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. Cannolis (talk) 18:39, 18 December 2022 (UTC)

February 2023
Hello, I'm Moops. I wanted to let you know that one or more of your recent contributions&#32;to Mechanical engineering 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 Teahouse or the Help desk. Thanks. — Moops  ⋠ T ⋡ 07:14, 4 February 2023 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did at Mechanical engineering. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. — Moops  ⋠ T ⋡ 07:17, 4 February 2023 (UTC)