weight spring

• 重锤弹簧

weight spring的用法和样例：

例句

1. The filament drive included a trailing weight and a preheater.
   长丝体的传动部分包括一个拖拉重锤和一个预热器。
2. Pendulum clocks showed the hours more exactly than earlier clocks, since the weight on the pendulum could be moved up or down to make the clock to go faster or slower.
   摆钟比早期的钟记时准，因为摆上的重锤可以上下移动调整钟的快慢。