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