Наблюдаващи

• 

  Bettie Astudillo

  https://git.monkeycap.com/aundreapidgeon/3728981/issues/177
• 

  Toby Ashburn

  https://cnrautoparts.com/blog/how-to-measure-your-exhaust-pipehow%20is%20exhaust%20pipe%20measured