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