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