Hydraulic mechanism, on, off: Listen & Download On, off, Hydraulic mechanism .mp3 Error! Change your browser, please! ⇓ Download Foot pump inflating a mattress ⚠ Hand winch ⚠ Kick the bike speed switch ⚠ Chain hoist, Chain ⚠ Hydraulic mechanism, off, on ⚠ Lower chains, Drawbridge ⚠ Drawbridge raise chains ⚠ Bicycle hand pump ⚠ Mechanical sounds ⚠ Small hydraulic gear ⚠ ★★★★★