Циркулярный

Credit to https://www.google.com/search?q=%D0%B2%D1%8B%D0%B0&client=opera-gx&hs=IWJ&sxsrf=AJOqlzXVm6XxCS7OnR3-DOPC4uoVNaWtpw:1677491007674&source=lnms&tbm=isch& for the images.