Building the air raid siren,Howto & Style,siren,howl,blower,air,alarm,tornado,Inspired by the howl of some of my blower experiments, I set out to try to build an air raid siren.
http://woodgears.ca/siren / air siren :: инглиш :: своими руками :: Видио :: сирена воздушной тревоги :: DIY
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