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