stranded wires helical spring

• 多股螺旋弹簧

stranded wires helical spring的用法和样例：

例句

1. The CD spectra showed that the addition of glycerol to the collagen did not damage the native triple helical structure of collagen.
   圆二色谱表明，甘油的加入没有改变胶原天然的三股螺旋结构。