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