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