Old alarm clocks and many doorbells and telephones emit a signal due to the blows of “hammer” metal hemisphere of the bell.
If you are annoying it’s pretty sharp rattling, stick a bell in place of hitting it square of adhesive tape or medical adhesive tape device will beep “whisper”.
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Hand scythe
In issue 6 for 2010, Modelist-Konstruktor told about repair and adjustment of a trimmer - a motor or electric scythe. The article is useful . What can I say, this tool is now widely used...
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