sprung chair seat

• 弹簧坐垫

sprung chair seat的用法和样例：

例句

1. On the sofa there are seat cushions.
   沙发上有坐垫。
2. They padded the seat of the chair with horse-hair to make it soft.
   他们往椅子的坐垫里填塞马鬃以使之柔软。