名詞 coil spring:

1. a spring in the shape of a coil
   同義詞：volute spring

1. A usually rectangular pad of heavy cloth filled with soft material or an arrangement of coiled springs, used as or on a bed.
   褥墊，床墊通常為長方形的棉布墊，內裝柔軟材料或排列好的彈簧，常用于床上
2. A fine coiled spring that regulates the movement of the balance wheel in a watch or clock.
   游絲在手表或鐘內用于調整計時器搖輪運動的細小的卷繞彈簧