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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THE ENVELOPE OF METAL
Its really easy to bend the tin, and even better — from a thin sheet of colored metal, but of course not for sending by post. Make at the top, not a bent valve, the opening and...
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In the journal "modelist-Konstruktor" No. 11'1991 I met the description motoart — tracked snowmobile, designed by brothers Matveichuk of Zavodoukovsk Tyumen region and named them...
