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