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