If there is no proper available spring wire, rubber band instead of spring made of simple rubber band dynamometer.
如果没有适当的弹簧钢丝，可用橡皮筋代替弹簧制成简易橡皮筋测力计。
2
This paper describes a simple-structured digital-display dynamometer that outperforms the traditional spring-type one. It also discusses the design of the dynamometer in detail.