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