A leather loop that slides to change the tension on the cord of a drum.
A leather loop that slides to change the tension on the cord of a drum.
滑动皮环通过滑动以改变鼓弦张力的皮环
A leather loop that slides to change the tension on the cord of a drum.
滑动皮环通过滑动以改变鼓弦张力的皮环