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