Sound of the handles of an exercise bicycle being turned around, creates the sound of a drawbridge being opened and closed. Variations in speed and intencity Microphone: Samsung CO1U<br/>吊橋<br/>聲道：1<br/>類型：wav<br/>closing、chains、drawbridge、castle、close、gate、owi、discordant、bike、turn、metal、squeaky、open、wooden、opening、door、cacophonous<br/>關閉、鏈、吊橋、城堡、關、門、那些、不和諧、自行車、轉、金屬、吱吱、打開、木、開盤、由、刺耳的<br/>資料來源：freesound ( https://freesound.org )