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