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