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